Problem 6.6:
Steam flows in a long, noninsulated pipe under a constant pressure of 2 bar. At the inlet of the pipe the temperature is 300 °C. Due to losses to the surroundings, the temperature at the exit of the pipe is 60 °C. Assume the surroundings to be at 25 °C.
a) Draw a PV graph for the steam. Show the path of the process and all the relevant pressures and isotherms.
b) Calculate the amount of heat removed from the steam.
c) Calculate the entropy change of the steam.
d) Calculate the entropy change of the surroundings. What is the entropy generation?