Two kilomoles of ammonia are burned in a steady flow process with x kmol of oxygen. The

Question:

Two kilomoles of ammonia are burned in a steady flow process with x kmol of oxygen. The products, consisting of H2O, N2, and the excess O2, exit at 200°C, 7 MPa.
a. Calculate x if half the water in the products is condensed.
b. Calculate the absolute entropy of the products at the exit conditions.