Chapter 14, Problem 14.55QP

Consider the following equilibrium systems:

1. (a) $\begin{array}{ll}\text{A}\stackrel{}{\rightleftharpoons }\text{2B}\hfill & \Delta H°=20.0\text{kJ/mol}\hfill \end{array}$
2. (b) $\begin{array}{ll}\text{A}+\text{B}\stackrel{}{\rightleftharpoons }\text{C}\hfill & \Delta H°=-5.4\text{kJ/mol}\hfill \end{array}$
3. (c) $\begin{array}{ll}\text{A}\stackrel{}{\rightleftharpoons }\text{B}\hfill & \Delta H°=0.0\text{kJ/mol}\hfill \end{array}$

Predict the change in the equilibrium constant K_c that would occur in each case if the temperature of the reacting system were raised.