Thermodynamics
Clausius Inequality
Entropy change is at least Q/T. Equality holds for reversible processes.
Variables
ΔSJ/K
Entropy change
Change in entropy
QJ
Heat transfer
Heat added to system
TK
Temperature
Temperature of reservoir
Derivation
From second law: for irreversible processes, entropy generation > 0, so ΔS > Q/T.
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