Question

1. On a mass basis a mixed gas stream consists of 3% nitric oxide, 4% sulfur dioxide, 39% carbon dioxide, and the balance nitrogen. Determine the molar composition and the ideal gas heat capacity of this mixed stream.

2. The mixed gas stream of problem 1 is fed to a waste heat boiler. In the boiler, heat is transferred from this gas stream to a water stream, which is fed to the boiler at a saturated liquid at 25 °C. The gas is fed at a rate of 2200 liters at STP per minute, and it exits the waste heat boiler at 75 °C. The water, which is fed at a ratio of 0.215 moles of water per mole hot gas, is heated by the gas such that it creates saturated steam at 5.0 bar. Assuming that the boiler is well insulated, determine the inlet temperature of the mixed gas stream. (Again, you are likely to need a solver to find your answer. There is no need to include any code or spreadsheet, but you must clearly show the equation you solved to find Tin.)

Answer 1