1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction. (i) H2(g) + NO(g) → H20(g) + N(g) (ii) N(g) + NO(g) → N2(g) + O(g) (iii) O(g) + H2(g)→ H20(g) Ea = 436 kJ AH = -491 kJ Ea = 625 kJ AH = -312 kJ Ea = 1690 kJ AH = +131 kJ a. What is the AH for the overall reaction? Overall, is it endothermic or exothermic? b. Draw the potential energy diagram for the reaction. Assume the potential energy of the reactants was 1400 kJ 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 Reaction Progress c. What is E, for the overall reaction? You must calculate this from the potential energy diagram. Potential Energy (kJ)

1. Consider these three reactions as the elementary steps in the mechanism for a chemical reaction. (i) H2(g) + NO(g) → H20(g) + N(g) (ii) N(g) + NO(g) → N2(g) + O(g) (iii) O(g) + H2(g)→ H20(g) Ea = 436 kJ AH = -491 kJ Ea = 625 kJ AH = -312 kJ Ea = 1690 kJ AH = +131 kJ a. What is the AH for the overall reaction? Overall, is it endothermic or exothermic? b. Draw the potential energy diagram for the reaction. Assume the potential energy of the reactants was 1400 kJ 2600 2400 2200 2000 1800 1600 1400 1200 1000 800 600 400 200 Reaction Progress c. What is E, for the overall reaction? You must calculate this from the potential energy diagram. Potential Energy (kJ)

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter11: Chemical Kinetics: Rates Of Reactions

Section11.7: Reaction Mechanisms

Problem 11.12E

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