Question

The enthalpy and entropy change of a reaction are -3.9 3.9kJ / mole and +56.6 J/mole K respectively at 250 C. What is the free energy change in kJ / mole ? Is this reaction always spontaneous, never spontaneous or does it depend on the temperature ?

Answer 1

-20.59 kJ/mole

This reaction is spontaneous. According to the free energy equation, any reaction with a net negative value of Gibbs free energy will take place spontaneously.