Entropy change in chemical reactions

  • The entropy change for a chemical reaction among pure, crystalline substances is zero at the absolute zero K by the Third law of thermodynamics.
  • Therefore, the entropy change of a chemical reaction at 298 K is simply the difference between the sum of the standard entropies of the products and the sum of the standard entropies of the reactants.

  • The entropy changes at other temperatures

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Thermodynamics in Energy Engineering

Hanyang University