Chapter 14.4, Problem 1RCF

Use the following information to answer questions 14.4.1 and 14.4.2: K_c for the reaction

${\text{PCl}}_3(g)+{\text{Cl}}_2(g)\rightleftharpoons {\text{PCl}}_5(g)$

is 10.0 at a certain temperature.

14.4.1    At a certain point during the reaction, there are 0.50 mole each of PCl₃ and Cl₂ and 0.25 mole of PCl₅ present in a 5.00-L container. Determine whether this system is at equilibrium. If it is not, predict which way the net reaction will proceed.