Chapter 12, Problem 55QAP

Iodine chloride decomposes at high temperatures to iodine and chlorine gases.

$2\text{ICl}\left(g\right)\rightleftharpoons {\text{I}}_2\left(g\right){\text{+Cl}}_2\left(g\right)$Equilibrium is established at a certain temperature when the partial pressures of ICl, I₂, and Cl₂ are (in atm) 0.43, 0.16, and 0.27, respectively.

(a) Calculate K.

(b) If enough iodine condenses to decrease its partial pressure to 0.10 atm, in which direction will the reaction proceed? What is the partial pressure of iodine when equilibrium is reestablished?