Question detail

What happens to the temperature of a substance during a change of state (Changes of state and specific latent heat)

Try the question, check the answer, then read the explanation to understand the curriculum point.

At a glance

MCQ

Type

practice

Style

Topic

Internal energy and energy transfers

Question

  1. A. It increases continuously.
  2. B. It decreases continuously.
  3. C. It remains constant.
  4. D. It fluctuates randomly.

Answer

The correct answer is It remains constant..

Explanation

Particle lens: Describe arrangement, motion, spacing, collisions, or energy changes only when they are relevant here. This question asks: What happens to the temperature of a substance during a change of state (Changes of state and specific latent heat). The correct response is It remains constant., because specific latent heat concerns energy transferred during a state change with no temperature rise. In Changes of state and specific latent heat, the marking point should connect directly to apply MS 3b and MS 3c skills when rearranging and calculating with the specific latent heat equation. If the question includes values, the working must keep the appropriate unit and operation; if it is an explanation, it must name the relevant particle behaviour or energy change. This item belongs to Internal energy and energy transfers, so avoid answers that switch to a different quantity, confuse heat with temperature, or describe gas pressure without collisions when collisions are the reason. Checkpoint 444 is distinct because it uses this exact question context and the particle lens rather than a generic particle-model sentence.

Common mistake

Confusing Specific Latent Heat with Temperature Change

Students often confuse specific latent heat with temperature change, thinking that energy transferred during a state change affects temperature.

Remember that specific latent heat refers to the energy needed to change the state of a substance without changing its temperature. Focus on how energy affects particle arrangement rather than kinetic energy.

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What happens to the temperature of a substance during a change | AQA Physics | ExamCompanion