This question-specific review guide is tied to the answer reasoning for a PracticeTestVault item. Use it after you answer the question so the review stays focused on what the prompt actually tested.
What this question is testing
Objective: Apply the relationship between Gibbs free energy and spontaneity
Prompt focus: A chemical reaction is spontaneous at constant temperature and pressure when delta G is which of the following?
Why the correct answer works
Negative
A reaction is spontaneous when the Gibbs free energy change, delta G, is negative.
Why the tempting wrong answer fails
The tempting wrong answer usually loses because it skips the key condition, priority, or evidence in the prompt.
Plain-language takeaway
Gibbs free energy combines enthalpy and entropy as delta G equals delta H minus T delta S. A negative delta G indicates a thermodynamically favorable, spontaneous process under constant temperature and pressure.
Simple analogy
Think of apply the relationship between gibbs free energy and spontaneity like following a short checklist: identify the clue, confirm the rule, and then make the move that fits this exact scenario.
How to review it before a retake
- Underline the command word and name what the question is asking before rereading the choices.
- Compare the correct answer against the closest distractor and write the exact detail that separates them.
- Retest this objective with a fresh question without looking at the rationale first.