Question 1
Question detail
How does an increase in temperature affect the entropy of a substance?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Thermodynamics (A-level only)
Question
- A. It increases the entropy
- B. It decreases the entropy
- C. It has no effect on entropy
- D. It doubles the entropy
Answer
It increases the entropy
Explanation
The correct option is It increases the entropy. It increases the entropy is the best answer because it directly supports the AQA A-Level Chemistry objective to explain entropy as a measure of dispersal of energy or disorder. This reasoning is anchored to Entropy and Gibbs free energy (A-level only) in Thermodynamics (A-level only), and it separates entropy from similar A-Level ideas rather than relying on a vague recall statement. Other options are weaker if they use the wrong evidence, calculation, mechanism, observation, unit, or conclusion for this subtopic.
Common mistake
Misunderstanding Entropy
Students often confuse entropy with energy, thinking it measures energy rather than the dispersal of energy or disorder in a system.
Entropy (S) is defined as a measure of the dispersal of energy or disorder. To clarify, remember that higher entropy indicates greater disorder and energy dispersal in a system, while lower entropy indicates more order. For example, in a solid, particles are closely packed and have low entropy, whereas in a gas, particles are far apart and have high entropy.
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