What is the standard Gibbs free energy change (ΔG) for the reaction 4KClO3(s) → 3KClO4(s) + KCl(s) at 25°C given the provided data?
Understand the Problem
The question is asking for the calculation of the standard Gibbs free energy change (ΔG) for a chemical reaction at 25°C, which involves determining the change from reactants to products. This involves using thermodynamic data for the substances involved in the reaction.
Answer
-827.6 kJ
ΔG°rxn = [3(-303.2) + (-409.2)] - [4(-296.3)] = -827.6 kJ
Answer for screen readers
ΔG°rxn = [3(-303.2) + (-409.2)] - [4(-296.3)] = -827.6 kJ
More Information
The reaction has a negative ΔG°, indicating it is spontaneous at 25°C.
Tips
A common mistake is to forget to multiply the Gibbs free energy of formation by the stoichiometric coefficients of the reactants and products.
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