Question

State second law of thermodynamics. How is heat engine
different from refrigerator?

Answer 1

Answer:

The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time, and is constant if and only if all processes are reversible. Isolated systems spontaneously evolve towards thermodynamic equilibrium, the state with maximum entropy.

In a heat engine, heat is transferred from a source at higher temperature to a sink at lower temperature. A refrigerator is a reverse of a heat engine.

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