Which of the following best describes specific latent heat?

The correct answer is The energy needed to change the state of one kilogram of a substance without changing its temperature..

Definition lens: Give the precise definition, then add a context sentence that shows how it is used. This question asks: Which of the following best describes specific latent heat. The correct response is The energy needed to change the state of one kilogram of a substance without changing its temperature., because changes of state are explained by particle energy and arrangement. In Internal energy, the marking point should connect directly to explain why energy transfer can change state without changing temperature. 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 258 is distinct because it uses this exact question context and the definition lens rather than a generic particle-model sentence.