What does a positive ΔG indicate about a reaction?

A The reaction is spontaneous

B The reaction is nonspontaneous (requires energy input)

C The reaction is at equilibrium

D The reaction is exothermic

✓ Correct Answer: Option B

Positive ΔG (Gibbs free energy) means the reaction is thermodynamically nonspontaneous under those conditions.

💡 Why is B) the correct answer?

The correct answer to the question "What does a positive ΔG indicate about a reaction?" is Option B: The reaction is nonspontaneous (requires energy input).

The other options — A) The reaction is spontaneous, C) The reaction is at equilibrium, D) The reaction is exothermic — are incorrect for this AP Exam Prep question. As explained above: Positive ΔG (Gibbs free energy) means the reaction is thermodynamically nonspontaneous under those conditions.

📚 About This AP Exam Prep Practice Question

This 2-level AP Exam Prep question from the AP Chemistry topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free AP Exam Prep practice test or use flashcards for spaced repetition review.

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What does a positive ΔG indicate about a reaction?

✓ Correct Answer: Option B

📚 About This AP Exam Prep Practice Question

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