Problem 3.39:
Saturated steam at 1 bar is heated at constant pressure to a final temperature of 500 °C in a closed system. Treating steam as an ideal gas, determine the amount of heat and work, and the change in enthalpy and internal energy. Compare with the steam tables and discuss. The ideal-gas heat capacity of steam is given by
with T in kelvin.
Problem 3.40:
Steam undergoes reversible adiabatic expansion from 500 °C, 10 bar. Assuming ideal-gas state, answer the following:
a) What is the pressure if the final temperature is 350 °C?
b) What is the temperature if the final pressure is 7 bar?
Additional data: The ideal-gas heat capacity of steam is