Which equation represents the energy required for a change of state ? P43-060 Changes of state and specific latent heat checkpoint

The correct answer is E = m x L ? P43-060 density measurement and calculation.

Definition lens: Give the precise definition, then add a context sentence that shows how it is used. This question asks: Which equation represents the energy required for a change of state ?. The correct response is E = m x L ? P43-060 density measurement and calculation, 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 390 is distinct because it uses this exact question context and the definition lens rather than a generic particle-model sentence.