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

The correct answer is It remains constant.

Method lens: First identify the measured quantity, then match the equation or particle idea to the command word. 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 density links mass and volume, so the answer must preserve which quantity is being calculated. In Changes of state and specific latent heat, the marking point should connect directly to identify energy in joules, mass in kilograms and specific latent heat in joules per kilogram. 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 392 is distinct because it uses this exact question context and the method lens rather than a generic particle-model sentence.