5.8. With respect to 1 kg of liquid water: (a) Initially at 0C, it is heated to 100C by contact with a heat reservoir at 100C. What is the entropy change of the water? Of the heat reservoir? What is A Stotal? (b) Initially at 0C, it is first heated to 50C by contact with a heat reservoir at 50C and then to 100C by contact with a reservoir at 100C. What is A Stotal? (c) Explain how the water might be heated from 0C to 100C so that AStotal = 0