Chapter 12, Problem 21QAP

When one mole of carbon disulfide gas reacts with hydrogen gas, methane and hydrogen sulfide gases are formed. When equilibrium is reached at 900°C, analysis shows that $P_{{\text{CH}}_4}=0.0833$ atm, $P_{{\text{H}}_2\text{S}}=0.163$ atm, $P_{{\text{CS}}_2}=1.27$ atm, and $P_{{\text{H}}_2}=0.873$ atm.

(a) Write a balanced equation (smallest whole-number coefficients) for the reaction.

(b) Find K at 900°C.