100% (6 ratings) Solution= (A) The reaction is endothe …. Transcribed image text: Is the following reaction endothermic or exothermic? shows whether a reaction is exothermic. B. what could you change about the system that would shift its equilibrium position? 19. In the reaction H2 + I2 → 2HI the molecularity is two. For the following exothermic reaction, the rate law at 298 K is: rate=k[H2][I2] H2(g)+I2(g)-->2HI (g) Predict the effect of each of the following changes on the initial rate of the reaction. It can be represented as. Give example. Photosynthesis, evaporation, sublimation, and melting ice are great examples. For the reaction below H2(g) + I2(g) 2HI(g) at a certain temperature, the Chemistry questions and answers. Report 12 years ago. Jul 28, 2016 - Exothermic reactions release energy. Ex. Answer:Adsorption is always exothermic. For … Define Hess's law. C. The reaction absorbs energy. YOU MIGHT ALSO LIKE... 36 terms. This statement can be explained in two ways. For the endothermic reaction. (2 marks) (b) Propose the two elementary steps for this reaction based on the energy profile and state the intermediate. The following reaction: H2 + I2 → 2HI, is an example of synthesis reaction. Exothermic reactions are chemical changes that release heat. How can endothermic reaction be spontaneous? H2+I2—>2HI What is the total energy of the reaction? H2 (g) +12 (g) +energy (heat) + 2 HI (g) Select the correct answer below: endothermic exothermic neither endothermic nor exothermic both endothermic and exothermic FEED. a) Compare the total energy of the solid NaOH with that of the solution and state which is greater. Answer: It is a combination reaction. 2. This implies that the forward reaction is: Chang & Goldsby. B. In your case, the forward reaction will look like this #"A" -> "B" + "heat"# Since heat is released during the reaction, the product will have a lower energy than the reactant. Is the dissociation reaction exothermic or endothermic? exothermic. Report 12 years ago. We must use stoichiometry to solve. Exothermic reactions transfer energy to the surroundings and the temperature of the surroundings increases. If the initial [H2] = 0.200 M and [I2] = 0.200 M and the Keq = 55.6 at 20 oC, calculate the equilibrium concentration of all molecules. Hydrogen bromine breaks down into diatomic hydrogen and bromine in the reaction shown. The categorization of a reaction as endo- or exothermic depends on the net heat transfer. Endothermic reactions: Some endothermic reactions are also spontaneous at room temperature. Reaction Mechanisms H2(g) + I2(g) 2HI (g) • This balanced equations doesn’t show the steps of this reaction. If you increase the temperature in an endothermic reaction (delta H>0), then the products will be favored. For example: C (s) + H 2 O (ℓ) → CO (g) + H 2 (g) Δ H > 0. In an endothermic reaction, Δ H is greater than zero because the energy of the reactants is less than the energy of the products. Endothermic versus Exothermic comparison chart; Endothermic Exothermic; Introduction: A process or reaction in which the system absorbs energy from its surroundings in the form of heat. Choose whether the reaction is exothermic or endothermic. Is hydrogen H2 or H? Video Transcript. ... Is the forward reaction shown in the diagram exothermic or endothermic? A reaction that is chemical in nature and is characterized by the release of energy in the form of heat or light is called an exothermic reaction. The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. Some examples of endothermic reactions are: • the reaction between barium hydroxide and ammonium chloride • the reaction between ethanoic acid and sodium carbonate Exothermic and endothermic reactions are used extensively in everyday life and in industry. Decrease the volume. Answers from Science - Chemistry - Similar ideas popular now. The volume of the vessel is increased nochange 20. The reaction rate is a direct function of the reactants concentrations, aA+ bB → cC #"Rate" = k[A]^x [B]^y# Where #a, b, c#: are the stoichiometric coefficients #x, y#: are the reactant orders The proposed mechanism is When hydrogen iodide is heated, the degree of dissociation increases. 6. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Is this reaction endothermic or exothermic? The forward reaction is exothermic and the reverse reaction is endothermic. What is the enthalpy change for this reaction and is it endothermic or exothermic? Answer. To do the reverse it must be an exothermic process...by doing this it is forming stronger intermolecular interactions and bond forming is exothermic. Share 3. exothermic because it is a combination reaction. For an endothermic reaction, energy of activation is Ea and enthalpy of reaction is ΔH (both of these in kJ/mol). H2(g) + I2(g) + heat ⇌ 2HI(g) Which change favors the reverse reaction? My book says that this sentence is true, but I … It is a dynamic state, where both forward and reverse processes continue with equal rates. (1 point) … Thus, increasing the temperature has the effect of increasing the amount of one of the products of this reaction. asked Dec 20, 2018 in Chemical Thermodynamics by pinky ( 74.4k points) thermodynamics ∙ 2014-05-12 21:19:21. Let me first reveal the identity of your salts: Salt A is ammonium nitrate () and Salt B is calcium chloride ( )." [2] The equilibrium will shift to the right. Solucionario. See answer (1) Best Answer. It depends on whether the reaction is endothermic or exothermic. Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. H of 52.9 kJ. The value of K for the reaction, Compared to distilled water, an aqueous salt solution has. Solution for At a temperature of 700 K, the forward and reverse rate constants for the reaction 2HI <=> H2 + I2 are kf = 1.8 * 10-3 M-1 s-1 and kr = 0.063 M-1…. Enthalpy is the amount of heat released or absorbed when a chemical reaction occurs at constant pressure. Answer:The value of the equilibrium constant, Kc, for the reaction H2(g) + I2(g) ⇔ 2HI (g) at 448°C is 50.5. deekshi65 deekshi65 01.12.2020 Chemistry Secondary School answered H2 + I2 ⇌ 2HI is an example for 2 See answers ... explain more about fourth point briefly that is exothermic reaction, endothermic reaction, sponta … The value of K for the reaction; H2 + I2 ⇋ 2HI is 49. b. 0. (i) Calculate the number of moles of iodine and the number of moles of hydrogen iodide in the equilibrium mixture. Key Facts. In terms of the relationship between being endothermic or exothermic and Le Chatelier's Principle, there were a few rules that were mentioned: 1. 0. What could you change about the system that would shift its equilibrium position? For the endothermic reaction. Exothermic reactions transfer energy to the surroundings and the temperature of the surroundings increases. Correct answer to the question Is ½ H2(g) + ½ I2(g) HI(g), H = +6.2 kcal/mole 21.0 kcal/mole + C(s) + 2S(s) CS2(l) endothermic of exothermic - hmwhelper.com. In the case of an exothermic reaction, the activation energy of the forward reaction will always be smaller than the activation energy of the reverse reaction.. Some of the information relating to exothermic and endothermic reactions is summarised in Table 12.1. Let me first reveal the identity of your salts: Salt A is ammonium nitrate () and Salt B is calcium chloride ( )." Calculate the value of Kc for this equilibrium. A good example of an endothermic reaction is photosynthesis. In terms of the relationship between being endothermic or exothermic and Le Chatelier's Principle, there were a few rules that were mentioned: 1. a solid subliming into a gas v [ Choose ] endothermic exothermic a gas condensing and… H2 + I2 → 2HI What is the total energy of the reaction? View the full answer. Enthalpies are measured under standard laboratory conditions (S.L.C.) The teacher replies: “That’s because you were given two different salts. Bond enthalpy. The reaction releases energy. For endothermic Δ H ... For the reaction, H2 + I2 ⇋ 2HI, the equilibrium constant changes with. • The step-by-step sequence of reactions by which the overall chemical change occurs is a Reaction Mechanism. Result: Energy is absorbed from the environment into the reaction. Solution for Determine if each process is exothermic or endothermic. NCERT Solutions; Board Paper Solutions; ... dissociation energy.Due to this a large amount of energy is required to break this bond and thus the oxidation of N 2 is endothermic. For example, H2 + Cl2 → 2HCl ∆H = -183 kJ • In an endothermic reaction, ∆H is greater than zero because the energy ofthe reactantsis less than the energy of the product. For the reaction 2HI(g) ⇌ H2(g) + I2(g) at 720 K, the equilibrium constant value is 50. (1 point) A. Endothermic reactions consume energy. Answer (1 of 3): When you make bonds it requires energy and when you break bonds it releases energy. … The fact that endothermic reactions are spontaneous too means that there must be more than 140 Solution: 141 (d). The categorization of a reaction as endo- or exothermic depends on the net heat transfer. When solid sodium hydroxide is dissolved in water, the temperature of the solution formed rapidly increases. >> H2(g) + I2(g) 2HI(g) Δ H = + q cal ,th. (Although I’m 15 so I may be wrong!) This means on your energy diagram the products (2HI) should be 53kJ/mol higher than the reactants as this reaction is endothermic. Exothermic and endothermic: Common processes and solved examples. Explain whether the value of Kp is high at 100K or 200K. It may be a chemical process, such as dissolving ammonium nitrate in water, or a physical process, such as the melting of ice cubes. if less heat energy is … Subjects. The pressure is increased nochange 21. Find the Q value of the reaction H2(g) + I2(g) ⇌ 2HI(g) at an instant where concentration of H2, I2 and HI are found to be 0.2 moI L-1, asked Oct 12, 2020 in Physical and Chemical Equilibrium by Manish01 (47.6k points) physical and chemical equilibrium; class-11; 0 votes. #4. Given that the reaction H2(g) + I2 2HI(g), had been started with 1 mole of H2(s) and 3 mole of I¬2(g). I am not sure about the first one. 102 kJ/mol, exothermic 3. The forward reaction above is exothermic. .The dissociation of hydrogen iodide occurs as 2HI ↔ H2 + I2 Derive an expression for such type of reactions View Full Video. H2(g) + I2(g)⇄ 2HI(g) At equilibrium, the mixture is found to contain 1.580 mole of HI. high temperature, high pressure.5. As the given reaction is exothermic as the heat is released in the reaction. Explainyour answer. You need to heat water to get it to boil and turn it into steam, this is an endothermic process. Correct answer to the question Is ½ H2(g) + ½ I2(g) HI(g), H = +6.2 kcal/mole 21.0 kcal/mole + C(s) + 2S(s) CS2(l) endothermic of exothermic - hmwhelper.com. 11va … Click hereto get an answer to your question ️ The equilibrium constant K for the reaction : 2HI(g) H2(g) + I2(g) at room temperature is 2.85 and that at 698K is 1.4 × !0^-2 . Chemical Kinetics Book Chosen. high temperature, low pressure.4. A good example of an endothermic reaction is photosynthesis. 1 answer. English; History; Mathematics; Biology; ... endothermic of exothermic Other questions on the subject: Chemistry. Hydrogen iodide decomposes according to the reaction 2 HI(g) ⇌ H2(g) + I2(g) A sealed 1.50−L container initially holds 0.00623 mol of H2, 0.00414 mol of I2, and 0.0244 mol of HI at 703 K. When equilibrium is reached, the concentration of H2(g) is 0.00467 M. What are the concentrations of HI(g) and I2(g)? ... H2(g) + I2(g) + 53.0 kJ -> 2HI(g) Endo. 4. moles per liter. One of your salts generated an endothermic reaction with water, while the other salt generated an exothermic reaction with water. When a chemical reaction occurs, energy is transferred to or from the surroundings. Explain your answer. 20 terms. Subjects. Here, Hydrogen and Iodine combine to form Hydrogen iodide. Chemistry, 21.06.2019 22:10, YatesDevon3371. Switch; Flag; What is understood by exothermic and endothermic reaction ? Endothermic reactions. Rep gems come when your posts are rated by other community members. Folgende Aufgabe: 8,10 mol Wasserstoff und 2,94 mol Iod werden in einem Gefäß (V= 2,5 L) auf 448°C erhitzt. asked Jun 8, 2018 in Chemistry by Nisa (59.8k points) equilibrium; class-11; 0 votes. Explanation: Synthesis reaction: In simple words, synthesis reaction can be stated as two or more material merge to form a new material. 4. 0. Explain your answer. H2 + I2 ==> 2HI + heat and you remove I2, the reaction will shift to the left. H2 (g) + I2 (g) ---- 2HI (g) Kc = 2.35E-04 1.0 mol of H2 and 2.0 mol of I2 are placed in an empty 1.0 L flask What are the equilibrium concentrations of H2, I2, and HI? A process or reaction that releases energy from the system, usually in the form of heat. 0. 2HI(g) with a ? It is exothermic. 1 answer Log in Sign up. what could you change about the system that would shift its equilibrium position? ... Is the reaction endothermic or exothermic? ... and is endothermic. At constant pressure, heat flow equals enthalpy change: If the enthalpy change listed for a reaction is negative, then that reaction releases heat as it proceeds — the reaction is exothermic ( exo- = out). For this reaction: H2 (g) + I2 (s) <--> 2HI (g) + heat Which of the following changes would INCREASE the initial rate of the reaction? [4] The reaction will stop. Give an example of an endothermic reaction. ... • Exothermic reactions favor low temperature conditions. asked Dec 20, 2018 in Chemical Thermodynamics by pinky ( 74.4k points) thermodynamics Jul 28, 2016 - Exothermic reactions release energy. Hydrogen bromide breaks down into diatomic hydrogen and bromine in the reaction shown. ... Classify the following as exothermic or … Is the reaction between CO and H2 exothermic or endothermic? I was wondering what if the reaction is a backwards forwards reaction? Combustion and oxidation are the more common examples of this. Thus the reaction will shift in left or backward direction. Copy. The reaction for the formation of HI is: a) exothermic and the ΔH= -28kJ. Is this an endothermic or exothermic reaction? At 298 K, Kc= 1.3 x 10^-3, whereas at 783 K, Kc= 2.2 x 10^-2. H2(g) + I2(g) + 53kJ ---> 2HI(g) ... since the 53 kJ is on the left side of the equation, we know that this reaction is endothermic, because it must absorb 53 kJ of energy for the reaction to occur. e breaks down into diatomic hydrogen and bromine via the following reaction: 2HBr → H2 + Br2 Hydrogen iodide is formed from diatomic hydrogen and iodine via the following reaction: H2 + I2 → 2HI Are these reactions exothermic or endothermic? Rep gems come when your posts are rated by other community members. -102 kJ/mol, endothermic B. By Sofia Khan. A mixture of 1.4 mol H2 (g) and 1.4 mol I2 (g) are placed in a 2 dm3 flask at constant temperature and the following equilibrium was established: H2 (g) + I2 (g) 2HI (g). Start studying Endothermic or Exothermic. b) Classify this reaction as endothermic or exothermic. Photosynthesis, evaporation, sublimation, and melting ice are great examples. H2 + I2 <-> 2HI + 3 kcal The formation of_____was favored by the addition of heat. H2 (g) + I2 (g) 2HI (g) ii. Some of the information relating to exothermic and endothermic reactions is summarised in Table 12.1. Reaction Conditions Reaction conditions for a chemical reaction require • collisions between reacting molecules • collisions with sufficient energy to break the bonds in the reactants • the breaking of bonds between atoms of the reactants • the forming of new bonds to give products What is endothermic reaction. Answer:The value of the equilibrium constant, Kc, for the reaction H2(g) + I2(g) ⇔ 2HI (g) at 448°C is 50.5. deekshi65 deekshi65 01.12.2020 Chemistry Secondary School answered H2 + I2 ⇌ 2HI is an example for 2 See answers ... explain more about fourth point briefly that is exothermic reaction, endothermic reaction, sponta … Is the dissociation reaction exothermic or endothermic? Explain the term Bond energy 3. Effect of Catalyst Afiq Arshad. [H2] increases. In order to achieve maximum NH3 yield, this reaction should be carried out at 1st low temperature, low pressure.2. low temperature, high pressure.3. a. If you increase the temperature in an endothermic reaction (delta H>0), then the products will be favored. it is definetily exothermic as h2 is mkore stable then 2h therefore it has less potential eneergy so the product in the reaction have less energy therefore the heat of reaction is negative In an exothermic reaction, heat is evolved in the formation of products. Write a definition of an endothermic reaction. #4. Wiki User. x. Hydrogen is the most abundant element in the universe and it has an atomic number of 1 . Combustion and oxidation are the more common examples of this. Can we determine whether a reaction is endothermic or exothermic? Is this an endothermic or exothermic reaction? 4. Some of the information relating to exothermic and endothermic reactions is summarised in table 14.1. Let's categorize them as exothermic … B: Energy involved in the bonds forming is greater than that of the bonds breaking. Related Papers. In an exothermic reaction, heat is being released and bonds are being formed. But in endothermic reactions, bonds are being broken because energy is being put in to break the bonds. The reaction that you wrote indicates that it is an exothermic reaction because from the elements 2C and O2, it is forming bonds to make 2CO. H2(g) + I2(g) ⇄. Is n2 3h2 endothermic The reaction to ammonia synthesis N2(g) + 3H2(g) ⇌ 2NH3(g) is exothermic. The equation for the decomposition of hydrogen Iodide is 2HI (g) H2 (g) + I2 (g) H= +52kJ Write the equilibrium concentration for the reaction. When the products of a reaction have more energy than the reactants: calorimeter. Many processes that happen in daily life, give out heat or take in heat, for example, respiration, photosynthesis, etc. ... Now, we know that for the endothermic reaction, increase in temperature causing the reaction to move in the Forward direction and vice versa. The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. It can be represented as H2 (g) + I2 (g)-- > < -- 2HI(g) ∆H=-10.4 kJ This equilibrium is an exothermic one. 2HBr - H2 + Br2 The energy of the reactant is 732 kJ/mol and the energy of the products is 630 kJ/mol. A+X -->AX ; A synthesis reaction is always exothermic since they deliver power in the form of heat and light. It shows the energy in the reactants and products , and the difference in … • Example-1: 1.000 mole of H2 gas and 1.000 mole of I2 vapor are introduced into a 5.00-liter sealed flask. any temperature, any pressure Temperature increase and … Therefore, adsorption is always exothermic. Explain. _____ Hope it helps. H2 (g) + I2 (g)-- > < -- 2HI(g) ∆H=-10.4 kJ. Figure 12.3: The energy changes that take place during an endothermic reaction. Give an example of each. The formation of HI from H2 and I2 is an example of gaseous homogeneous equilibrium reaction. The equilibrium mixture was found to contain 0.36 mol of H2 (g). Explain. Use the following table: Now, we have: 2 H X 2 + O X 2 2 H X 2 O. Give an example of an exothermic reaction. Given the following reaction: H2(g)+I2(s) ? 3. Energy is absorbed in the reaction. What is the equilibrium constant for the reaction H2 g )+ I2 g ⇌ 2HI g at 700 K? You need to heat water to get it to boil and turn it into steam, this is an endothermic process. ... (endothermic, negative) C) (exothermic, positive) D) (exothermic, negative) 5. Overall this must also increase in stability. At equilibrium, what happens if I2 is removed from the reaction mixture at constant temperature and volume? (a) The reverse reaction of the given reaction is. Consider the following data obtained for the following equilibrium: H2 (g) + I2 (g) 2 HI (g) The forward reaction above is exothermic. At equilibrium, what happens if I2 is removed from the reaction mixture at constant temperature and volume? select all that apply 1.) Your assumption was partially correct in that the change would produce more products, but this change is too negligible to really shift the equilibrium. Example : H2 + I2 2HI and [HI]2 k1 = [H2] [I2] For forward reaction. H2 (g) + I2 (g) 2 HI (g) The forward reaction above is exothermic. Addition of hydrogen gas at constant temp and volume b. In an endothermic reaction, Δ H is greater than zero because the energy of the reactants is less than the energy of the products. C+O2----- CO2 Is it Endothermic or Exothermic Reaction - Science - Chemical Reactions and Equations. ... of Toronto. Label the axes, (H and the activation energy. Cause your … (c) Given that the transition state 2 (TS2) has a structure similar to that of transition state 1 (TS1), propose a possible structure for TS2. IB Chemistry – HL Topic 7 Questions 1. 9 ; View Full Answer About Us; Blog; Terms & Conditions; Our Results; Is H2 I2 2HI exothermic or endothermic? Exothermic reactions are chemical changes that release heat. H2 + I2 = 2HI. Chemistry, 21.06.2019 22:10, YatesDevon3371. A catalyst is added nochange Consider the following equilibrium system: 3 Fe (s) + 4 H2O (g) <------> Fe3O4 (s) + 4 H2 (g) State what effect each of the … Increase in volume of the reaction vessel at … Why is N2 + O2 gives 2NO an endothermic reaction Whereas all other oxidation reactions are exothermic - Science - Chemical Reactions and Equations. H2(g)+I2(g)⇌2HI(g)+heat Increasing the temperature of the reaction increases the internal energy of the system. (1 point) A. H2 (g)+I2 (g)→2HI (g), given; H-H bond energy: 436 kJ/mol, I-I bond energy: 151 kJ/mol, H-I bond energy: 297 kJ/mol. In the reaction H2 + I2 → 2HI the molecularity is two. What happens to the equilibrium?Ait gets shifted to the right Bit remains unchanged Cit gets shifted to the left Dfirst (B) then (C) For an endothermic reaction, energy of activation is Ea and enthalpy of reaction is ΔH (both of these in kJ/mol). Endothermic reactions take in energy and the … Add a catalyst. Chapter 5 Energia(1) By Maria Tania. Short Answer type ( 2 marks each) 1. If the . Chapter 6 Chemical Reactions and Quantities 6.9Energy Changes inChemical Reactions. Chapter 8 Thermochemistry. 2HI ⇋ H 2 + I 2 (Remember: If the reaction is reversed equilibrium constant is given by 1/ k) ∴ Equilibrium constant = 1/65.5 = 0.0152 (b) The reaction 3H 2 + 3I 2 ⇋ 6HI has been obtained by multiplying the reaction H 2 + I 2 ⇋ 2HI by 3. Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. ... Can we determine whether a reaction is endothermic or exothermic? Why is the reaction H2+Cl2 = 2HCl exothermic? Exothermic and endothermic reactions. The teacher replies: “That’s because you were given two different salts. Heat will be released to the environment in this reaction. Identifying Types of Chemical Reactions. if more heat energy is released in making bonds in the products than is taken in when breaking bonds in the reactants; endothermic. If 1.00 mol H2 and 2.00 mol I2 are introduced into an empty 0.50 L reaction vessel, find the equilibrium concentration of all components at 400 degrees Celcius. Therefore I believe it is endothermic. For myself, when I discuss this concept with students I like to write the chemical equation (in a generic way) as exothermic or endothermic. Science. #4. Increase in volume of the reaction vessel at constant temp c. Addition of a catalyst d. Increase in temp ... H2(g) + I2(g) ® 2HI(g) If the following changes are made : a. For the following exothermic reaction, the rate law at 298 K is, rate = k [H2][I2]. b) Is the reaction endothermic or exothermic? 2HBr → H2 + Br2 Hydrogen iodide is formed from diatomic hydrogen and iodine via the following reaction: H2 + I2 → 2HI Are these reactions exothermic or endothermic? THERMOCHEMISTRY • Exothermic & Endothermic Reactions • Enthalpy • Calorimetry. C: More bonds are broken than are formed. [5] None of the above. Right next to the equation, I will write the equilibrium expression. Química. 7. What is the change in enthalpy for the following reaction: HI(g) ? At 400 degrees Celcius Kc=64 for the equilibrium H2(g)+I2(g)-->2HI(g). What is the total energy of the reaction? (a) Is this reaction an exothermic or an endothermic reaction? Is hydrogen H2 or H? Correct answers: 3 question: H2 and i2 react in an exothermic reaction according to the following equation: h2(g) + i2(g) 2hi (g) h2 and i2 are placed in a sealed container and are allowed to reach equilibrium. H2 and I2 react in an exothermic reaction according to the following equation: H2(g) + I2(g) Double arrow yields 2HI (g) H2 and I2 are placed in a sealed container and are allowed to reach equilibrium. When a gas is adsorbed on a solid surface, … This causes a decrease in the surface energy of the adsorbent. A positive value would indicate that the reaction was endothermic. 400. When the temperature is raised , the reaction will shift in a direction where temperature is decreasing and that is the reverse reaction which is endothermic in nature. Calculate the value of Q when H2(g) is added before the new equilibrium is established. Exothermic reactions. Answer. colder. H2(g) + I2(g) ⇄ 2HI(g) At equilibrium, the mixture is found to contain 1.580 mole of HI. Endothermic as the forward reaction is favoured by an increase in temperature. What is the value of Kc at this temperature? (1 point) … or endothermic. answered. 2HI(g) H2(g) + I2(g) The equilibrium mixture was found to contain 0.023 mol of hydrogen. H2 + I2 ==> 2HI + heat and you remove I2, the reaction will shift to the left. The reaction you describe is H_2 + I_2 --> 2HI. in order to predict whether or not a processes, let me know whether or not heat is released or absorbed. Consider the reaction: N2 (g) + 3 H2 (g) ( 2 NH3 (g) (H = - 92 kJmol-1. –9 kJ/mol, exothermic B.9 kJ/mol, exothermic C. 9 … For example: C (s) + H 2 O (ℓ) → CO (g) + H 2 (g) Δ H > 0. 5. e breaks down into diatomic hydrogen and bromine via the following reaction: 2HBr → H2 + Br2 Hydrogen iodide is formed from diatomic hydrogen and iodine via the following reaction: H2 + I2 → 2HI Are these reactions exothermic or endothermic?
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