Chapter 8, Problem 45P

The iodination of ethylene at $25°$ C is characterized by the thermodynamic values shown.

${\text{CH}}_{\text{2}}{\text{=CH}}_{\text{2}}{\text{(g) + I}}_{\text{2}}\text{(g) }\to {\text{ICH}}_{\text{2}}{\text{CH}}_{\text{2}}\text{I(g) }\Delta {\text{H}}^{\text{o}}\text{ = }-\text{48 kJ; }\Delta {\text{S}}^{\text{o}}\text{ = }-\text{0}\text{.13 kJ/K}$

(a) Calculate $\text{ΔG°}$ and K at $25°$ C.

(b) Is the reaction exergonic or endergonic at $25°$ C?

(c) What happens to K as the temperature is raised?