1. An ice cube at 0.0°C is gradually melting. What is the change in the ice cube’s entropy for each 1.00 g of ice that melts?
2. A reversible engine with an efficiency of 30.0% has TC= 310.0 K. (a) what is TH? (b) How much heat is exhausted for every0.100 kJ of work done?
3. A heat engine takes in 125 kJ of heat from a reservoir at815 K and exhausts 82 kJ to a reservoir at 293 K. (a) what is the efficiency of the engine? (b) What is the efficiency of an ideal engine operating among the same two reservoirs?
4. A monatomic perfect gas follows the cyclic process shown in the figure. The temperature of the point at the bottom left of the triangle is 470.0 K. (a) How much net work does this engine do per cycle? (b) What is the maximum temperature of this engine? (c) How many moles of gas are utilized in this engine?