A rigid vessel contains 50 kg of saturated liquid water and 4.3 kg of saturated water vapor. The pressure in the vessel is 10 kPa. You have been asked to determine how much heat is needed to evaporate all of the liquid.
(a) Define and draw your system. Write and simplify the energy balance for the evaporation process. Justify any terms you drop from the energy balance.
(b) What is the final pressure in the vessel after the evaporation is complete?
(c) Calculate the heat required for this process.