?At a temperature of 700 K, the forward and reverse rate constants for the reaction \(2

Chapter 15, Problem 15.94

(choose chapter or problem)

At a temperature of 700 K, the forward and reverse rate constants for the reaction \(2 \mathrm{HI}(g) \rightleftharpoons \mathrm{H}_{2}(g)+\mathrm{I}_{2}(g)\) are \(k_{f}=1.8 \times 10^{-3} \mathrm{M}^{-1} \mathrm{~s}^{-1}\) and \(k_{r}=0.063 \mathrm{M}^{-1} \mathrm{~s}^{-1}\).

(a) What is the value of the equilibrium constant \(K_{c}\) at 700 K?

(b) Is the forward reaction endothermic or exothermic if the rate constants for the same reaction have values of \(k_{f}=0.097 \mathrm{M}^{-1} \mathrm{~s}^{-1}\) and \(k_{r}=2.6 \mathrm{M}^{-1} \mathrm{~s}^{-1}\) at 800 K?

Text Transcription:

2 HI(g) \rightleftharpoons H_2(g)+I_2(g)

k_f=1.8 \times 10^-3 M^-1 s^-1

k_r=0.063 M^-1 s^-1

K_c

k_f=0.097 M^-1 s^-1

k_r=2.6 M^-1 s^-1