A mixture having a molar analysis of 78% N2, 21% O2, and 1% Argon enters a constant diameter duct operating at a steady state at 27 C and 1bar. Owing to heat transfer from the surroundings, the mixture exits the duct at 227 C. Kinetic and potential energy effects are negligible. Determine: a. The apparent molecular weight of the mixture. b. The heat transfer per kmol of mixture flowing.