Edexcel IAL Chemistry A2 12.7 Entropy change of the system
Edexcel IAL Chemistry A2 12.7 Entropy change of the system
Multiply every S° value by its balanced-equation coefficient, total products and reactants separately and calculate products minus reactants with sign.
How this is tested
- Calculate ΣS° for products and reactants with all stoichiometric coefficients applied.
- Subtract reactant entropy from product entropy and report sign and J K⁻¹ mol⁻¹ units.