For a reaction at standard conditions, if ΔG° is positive, what can be said abou

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Question: For a reaction at standard conditions, if ΔG° is positive, what can be said about the reaction?

Options:

Correct Answer: The reaction is spontaneous in the reverse direction.

Solution:

A positive ΔG° indicates that the reaction is non-spontaneous in the forward direction, thus spontaneous in the reverse.

For a reaction at standard conditions, if ΔG° is positive, what can be said about the reaction?

For a reaction at standard conditions, if ΔG° is positive, what can be said about the reaction?

Step 1: Understand what ΔG° means. ΔG° is the change in free energy for a reaction at standard conditions.
Step 2: Recognize that a positive ΔG° value indicates that the energy of the products is higher than the energy of the reactants.
Step 3: Realize that if a reaction has a positive ΔG°, it means that the reaction does not occur spontaneously in the forward direction.
Step 4: Conclude that since the forward reaction is non-spontaneous, the reverse reaction must be spontaneous.

Gibbs Free Energy (ΔG°) – ΔG° indicates the spontaneity of a reaction; a positive value means the reaction is non-spontaneous in the forward direction.
Spontaneity of Reactions – Understanding that a positive ΔG° implies the reaction will not occur without external input, while the reverse reaction is spontaneous.