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Assertion (A): For every chemical reacti...

Assertion (A): For every chemical reaction at equilibrium, standard Gibbs enegry of the reaction is zero.
Reason (R ) : At constant temperature and pressure chemical reactions are spontaneous in the direction of the decreasing Gibbs energy.

A

Both (A) and (R ) are correct, and (R ) is the correct explanation for (A).

B

Both (A) and (R ) are correct, but(R ) is not a correct explanation for (A).

C

(A) is correct, but (R ) is incorrect.

D

(A) is incorrect, but (R ) is correct.

Text Solution

AI Generated Solution

To solve the assertion and reason question, we need to analyze both statements carefully. ### Step-by-Step Solution: 1. **Understanding the Assertion (A)**: - The assertion states that "For every chemical reaction at equilibrium, standard Gibbs energy of the reaction is zero." - At equilibrium, the Gibbs free energy change (ΔG) for the reaction is indeed zero, but this does not imply that the standard Gibbs energy change (ΔG°) is also zero. The standard Gibbs energy change is a constant value for a given reaction under standard conditions and does not change with the state of the reaction (i.e., whether it is at equilibrium or not). - Therefore, the assertion is **incorrect**. ...
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