Entropy Change Calculator

Calculate entropy change for a reversible heat transfer: DeltaS = Q / T.

J
K

Entropy Change

3.3333 J/K

Entropy Change vs Heat Transferred

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Formula

## Entropy Change Entropy measures the disorder or unavailability of energy in a system. ### Formula **DeltaS = Q / T** for a reversible process at constant temperature. Positive DeltaS means entropy increases (heat absorbed). The second law states that total entropy of an isolated system never decreases.

Exemplo Resolvido

1000 J of heat absorbed at 300 K.

  1. 01DeltaS = Q / T
  2. 02DeltaS = 1000 / 300
  3. 03DeltaS = 3.333 J/K