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HCI(g) can be synthesized from H,(g) and Cl,(g) as represented above. A student studying the kinetics of the reaction proposes the following mechanism. AH = 242 kJ/mol, AH = 4 kJ/mol, -432 kJ/mol, 2 Cl(g) (slow) Step 1: Cl,(g) Step 2: H,(g) + CI(g) HCI(g) + H(g) Step 3: H(g) + Cl(g) HCI(g) (fast) (fast) AH 42. Which of the following statements identifies the greatest single reason that the value of K, for the overall reaction at 298 K has such a large magnitude? (A) The activation energy for step I of the mechanism is large and positive. (B) The activation energy for step 2 of the mechanism is small and positive. (C) The value of AS for the overall reaction is small and positive. (D) The value of AH° for the overall reaction is large and negative.

HCI(g) can be synthesized from H,(g) and Cl,(g) as represented above. A student studying the kinetics of the reaction proposes the following mechanism. AH = 242 kJ/mol, AH = 4 kJ/mol, -432 kJ/mol, 2 Cl(g) (slow) Step 1: Cl,(g) Step 2: H,(g) + CI(g) HCI(g) + H(g) Step 3: H(g) + Cl(g) HCI(g) (fast) (fast) AH 42. Which of the following statements identifies the greatest single reason that the value of K, for the overall reaction at 298 K has such a large magnitude? (A) The activation energy for step I of the mechanism is large and positive. (B) The activation energy for step 2 of the mechanism is small and positive. (C) The value of AS for the overall reaction is small and positive. (D) The value of AH° for the overall reaction is large and negative.

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter14: Chemical Kinetics: The Rates Of Chemical Reactions
Section: Chapter Questions
Problem 84IL
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H,(g) + Cl,(g) 2 HCI(g) K, = 2 x 1030 at 298 K HCI(g) can be synthesized from H,(g) and Cl,(g) as represented above. A student studying the kinetics of the reaction proposes the following mechanism. Step 1: Cl(g) 2 Cl(g) Step 2: H,(g) + Cl(g) HCI(g) + H(g) AH° = 242 kJ/mol, (slow) (fast) (fast) AH 4 kJ/mol, -432 kJ/mol %3D Step 3: H(g) + CI(g) HCI(g) AH° = 42. Which of the following statements identifies the greatest single reason that the value of K, for the overall reaction at 298 K has such a large magnitude? (A) The activation energy for step I of the mechanism is large and positive. (B) The activation energy for step 2 of the mechanism is small and positive. (C) The value of AS for the overall reaction is small and positive. (D) The value of AH° for the overall reaction is large and negative.
Transcribed Image Text:H,(g) + Cl,(g) 2 HCI(g) K, = 2 x 1030 at 298 K HCI(g) can be synthesized from H,(g) and Cl,(g) as represented above. A student studying the kinetics of the reaction proposes the following mechanism. Step 1: Cl(g) 2 Cl(g) Step 2: H,(g) + Cl(g) HCI(g) + H(g) AH° = 242 kJ/mol, (slow) (fast) (fast) AH 4 kJ/mol, -432 kJ/mol %3D Step 3: H(g) + CI(g) HCI(g) AH° = 42. Which of the following statements identifies the greatest single reason that the value of K, for the overall reaction at 298 K has such a large magnitude? (A) The activation energy for step I of the mechanism is large and positive. (B) The activation energy for step 2 of the mechanism is small and positive. (C) The value of AS for the overall reaction is small and positive. (D) The value of AH° for the overall reaction is large and negative.
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