In a test of rocket propellant performance, liquid hydrazine (N2H4) at 14.7 lbf/in 2, 77 F, and oxygen gas at 14.7 lbf/in 2, 77 F, are fed to a combustion chamber in the ratio of 0.5 lbm O2/lbm N2H4. The heat transfer from the chamber to the surroundings is estimated to be 45 Btu/lbm N2H4. Determine the temperature of the products exiting the chamber. Assume that only H2O, H2, and N2 are present. The enthalpy of formation of liquid hydrazine is 21647 Btu/lb mole.