A mixture of 65 percent N2 and 35 percent CO2 gases (on a mass basis) enters the

Question:

A mixture of 65 percent N2 and 35 percent CO2 gases (on a mass basis) enters the nozzle of a turbojet engine at 60 psia and 1400 R with a low velocity and it expands to a pressure of 12 psia. If the isentropic efficiency of the nozzle is 88 percent, determine
(a) The exit temperature.
(b) The exit velocity of the mixture. Assume constant specific heats at room temperature.