One mole of water and one mole of CO2 are placed in a reactor at 3000 K

Question:

One mole of water and one mole of CO2 are placed in a reactor at 3000 K and a total pressure of 400 kPa. The water dissociates into hydrogen and oxygen, and the carbon dioxide dissociates into carbon monoxide and oxygen. Determine the partial pressures of the H2O, the CO2, the O2, and the CO.