78. The heat engine, making a reversible Carnot cycle, one cycle does work 1 kJ. The heater temperature of 400 K and 300 K. Determine the refrigerator:
1) efficiency machine;
2) the quantity of heat received from the heater for a machine cycle;
3) the amount of heat given up the fridge.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)