What is Entropy

What is Entropy

What is Entropy

Second law of thermodynamics

Definition by Clausius : ” There is no thermodynamic transformation whose sole effect is to deliver heat from a reservoir of lower temperature to a reservoir of higher temperature.” Summary: heat does not flow upwards.

Definition by Kelvin : ”There is no thermodynamic transformation whose sole effect is to extract heat from a reservoir and convert it entirely to work”. Summary: a perpetuum mobile of second type does not exist.

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