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When is a reaction nonspontaneous?

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in Chemistry – Class 11 by (148k points)
When is a reaction nonspontaneous?

(a) Gibbs free energy is positive

(b) Gibbs free energy is negative

(c) Gibbs free energy is zero

(d) Does not depend on Gibbs free energy

I got this question in a national level competition.

Question is taken from Relationship between Equilibrium Constant K, Reaction Quotient Q and Gibbs Energy G in chapter Equilibrium of Chemistry – Class 11

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The correct answer is (a) Gibbs free energy is positive

Explanation: When Gibbs free energy is positive, the reaction that occurs is nonspontaneous and a reaction occurs backward that is the products are converted into reactants. Simply the reverse reaction could occur.

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