Chapter 15, Problem 15.74QP

Consider the following equilibrium systems.

$\begin{array}{cc}\left(\text{a}\right)\text{A}\rightleftarrows \text{2B}& \Delta H^{\circ }=\text{20}\text{.0kJ/mol}\\ \left(\text{b}\right)\text{A+B}\rightleftarrows \text{C}& \Delta H^{\circ }=-5.4\text{kJ/mol}\\ \left(\text{c}\right)\text{A}\rightleftarrows \text{B}& \Delta H^{\circ }=0.\text{0kJ/mol}\end{array}$

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