Problem- Suppose that 100 J of energy is taken from a hot source at 300 degrees C, passes through a turbine that converts some of the energy into work, and then releases the rest of the energy as heat into a cold sink at 20 degrees C. What is the maximum amount of work that can be produced by this engine if overall it is to operate spontaneously? What is the efficiency of the engine, with work done divided by the heat supplied expressed as a percentage? How could the efficiency be increased?
If possible just a to the point details about how you got the answer?