Entropy change calculator (ΔS from S° data)
Reaction entropy ΔS° from standard molar entropies S° in J/(mol·K) for products and reactants.
Calculator
How to use
ΔS from standard entropies
$$\Delta S^\circ \approx \sum \nu S^\circ(\text{products}) - \sum \nu S^\circ(\text{reactants})$$
When to use
- Combining with ΔH° to estimate ΔG° at a given temperature.
Educational use only. Double-check values for labs, homework, and exams.