Chapter 15, Problem 15.68QP

Conceptual Problems

15.68 Which of the following equilibria will shift to the left when the temperature is increased? [ΔH (kJ/mol) values are given in parentheses.] (Select all that apply.)

$\begin{array}{l}\left(\text{a}\right){\text{S+H}}_{\text{2}}\rightleftarrows {\text{H}}_{\text{2}}\text{S}\Delta H\left(-20\right)\\ \left(\text{b}\right){\text{C+H}}_{\text{2}}\text{O}\rightleftarrows {\text{CO+H}}_{\text{2}}\Delta H\left(131\right)\\ \left(\text{c}\right){\text{H}}_{\text{2}}{\text{+CO}}_{\text{2}}\rightleftarrows {\text{H}}_{\text{2}}\text{O+CO}\Delta H\left(41\right)\\ \left(\text{d}\right){\text{MgO+CO}}_{\text{2}}\rightleftarrows {\text{MgCO}}_{\text{3}}\Delta H\left(-117\right)\\ \left(\text{e}\right){\text{2CO+O}}_{\text{2}}\rightleftarrows {\text{2CO}}_{\text{2}}\Delta H\left(-566\right)\end{array}$