Why does a negative value for the change in Gibbs free energy tell us whether or

Question

Why does a negative value for the change in Gibbs free energy tell us whether or not a process will be spontaneous as written?

a) because exothermic processes are usually spontaneous, and a negative enthalpy change will lead to a negative change in Gibbs free energy

b) because when the change in Gibbs free energy is negative, the process will be spontaneous as written c) because the Gibbs equation combines two important state functions into a single one
d) because the change in Gibbs free energy is directly proportional to the entropy of the universe, and an increase in the entropy of the universe makes a process spontaneous


Please explain! Thanks :)

Explanation / Answer

because the change in Gibbs free energy is directly proportional to the entropy of the universe, and an increase in the entropy of the universe makes a process spontaneous

D is correct answer

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