The rate constants of a certain reaction at different temperatures were recorded as shown below.

Calculate the activation energy, ΔG^‡, ΔH^‡, ΔS^‡ of the reaction at 50°C. Express your answers to three significant figures.

• A. E_a = 33.8 kcal/molΔG^‡ = 44.6 kcal/molΔH^‡ = 33.2 kcal/molΔS^‡ = –0.0310 kcal/mol∙K
• B. E_a = 31.4 kcal/molΔG^‡ = 27.8 kcal/molΔH^‡ = 24.2 kcal/molΔS^‡ = –0.0310 kcal/mol∙K
• C. E_a = 21.3 kcal/molΔG^‡ = 26.7 kcal/molΔH^‡ = 20.7 kcal/molΔS^‡ = –0.0186 kcal/mol∙K
• D. E_a = 41.2 kcal/molΔG^‡ = 32.4 kcal/molΔH^‡ = 28.1 kcal/molΔS^‡ = –0.0174 kcal/mol∙K

Answer: (C)