CH3OH(g) —> CO(g) + 2 H2(g) DH° = +91 kJ/molrxn

The reaction represented above goes essentially to completion. The reaction takes place in a rigid, insulated vessel

that is initially at 600 K.

A sample of CH3OH(g) is placed in the previously evacuated vessel with a pressure of P1 at 600 K. What is the final pressure in the vessel after the reaction is complete and the contents of the vessel are returned to 600 K?

(A) P1/9

(B) P1/3

(C) P1

(D) 3P1