Calculate the equilibrium partial pressure of CO if initially PCO₂ = 1.32 atm and PCO = 4.85 atm. Pure graphite is present initially and when equilibrium is achieved. Making CO from CO₂ is a potential energy source. The value of Kp for the reaction is is 1.50 at 700.0°C. CO₂(g)+C(s) ⇌2CO(g) A. Calculate the equilibrium partial pressure of CO if initially PCO₂ = 1.32 atm and PCO = 4.85 atm. Pure graphite is present initially and when equilibrium is achieved.