Sergey Bylikin, Gary Horner and, Brian Murphy Solutions for Chapter: Equilibrium, Exercise 6: Quick question

${\mathrm{PCl}}_5\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_3\left(\mathrm{g}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right); \mathrm{\Delta H}º=+92.5 \mathrm{kJ}$ 

Predict and explain any shift in the equilibrium position when the temperature of the system is decreased.

${\mathrm{PCl}}_5\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_3\left(\mathrm{g}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right) \mathrm{\Delta H}º=+92.5 \mathrm{kJ}$ 

Predict and explain any shift in the equilibrium position when an additional chlorine gas is injected into the system.

${\mathrm{PCl}}_5\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_3\left(\mathrm{g}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right); \mathrm{\Delta H}º=+92.5 \mathrm{kJ}$ 

Predict and explain any shift in the equilibrium position when the pressure applied to the system is increased.

${\mathrm{PCl}}_5\left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_3\left(\mathrm{g}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right); \mathrm{\Delta H}º=+92.5 \mathrm{kJ}$ 

Predict and explain any shift in the equilibrium position when a catalyst is added.