A vessel contains 1 kg of H2O as liquid and vapor in equilibrium at 1000 kPa. If the vapor occupies 70% of the volume of the vessel, determine H and S for the 1 kg of H2O. (Hint: you need to use steam table)

9) A piston-cylinder contains 1 kg water at 20 °C with an absolute pressure of 101.3 kPa. The piston is pulled upward until the pressure in the piston is reduced to 50 kPa. The process is done slowly and the liquid and any vapor in the piston remain at 20 °C. What can be said of the phase of water in the piston? A. OB. O C. O D. Compressed liquid Liquid-vapor mixture Superheated steam Super-critical phase

A system consisting of 0.20 mol of supercooled gaseous water (95°C, 1 bar) partially condenses to liquid water; the process is done adiabatically at constant pressure.         At equilibrium, what is the temperature of the system? How many moles of gaseous water have condensed? Calculate the entropy change for the process.

7.