A piece of hot metal should be cooled rapidly (quenched) to 25°C, which requires removal of 1000 kJ from the metal. The cold space that absorbs the energy could be a bath of liquid water and ice. Calculate the change of entropy of the cooling medium.
A mass- and atmosphere-loaded piston/cylinder contains 2 kg of water at 5 MPa, 100°C. Heat is added from a reservoir at 700°C to the water until it reaches 700°C. find the work, heat transfer, and total entropy production for the system and surroundings.