Chapter 15.6, Problem 15.16WE

For each reaction, predict in what direction the equilibrium will shift when the volume of the reaction vessel is decreased.

(a) ${\text{PCl}}_{\text{5}}(g)\rightleftarrows {\text{PCl}}_{\text{3}}(g)+{\text{Cl}}_{\text{2}}(g)$

(b) $2\text{PbS}(s)+3{\text{O}}_{\text{2}}(g)\rightleftarrows 2\text{PbO}(s)+{\text{2SO}}_2(g)$

(c) ${\text{H}}_{\text{2}}(g)+{\text{I}}_{\text{2}}(g)\rightleftarrows 2\text{HI}(g)$