A constant-volume tank contains a mixture of 1 mol of H2 and 0.5 mol of O2 at

Question:

A constant-volume tank contains a mixture of 1 mol of H2 and 0.5 mol of O2 at 25°C and 1 atm. The contents of the tank are ignited, and the final temperature and pressure in the tank are 2800 K and 5 atm, respectively. If the combustion gases consist of H2O, H2, and O2, determine (a) the equilibrium composition of the product gases and (b) the amount of heat transfer from the combustion chamber. Is it realistic to assume that no OH will be present in the equilibrium mixture?