Combustion products with the molar anaylisis of 10% CO2, 20% H2O, 70% N2 enter an engine's exhaust pipe at 1000F, 1atm and are cooled as they pass through the pipe, exiting at 100F, 1atm. Determine the heat transfer rate at steady state, in Btu per lb of entering mixture. problem is similar to problem 61 in chapter 12 in the 7th edition of fundamentals of engineering thermodynamics.