During the melting of 0.75 kg of ice at 0 °C, 2.50 × 10⁶ J of energy is transferred. What is the specific latent heat of fusion of the substance (Changes of state and specific latent heat)

The correct answer is 3.33 × 10⁵ J kg⁻¹.

Application lens: Apply the rule to the specific sample or situation instead of reciting a broad fact. This question asks: During the melting of 0.75 kg of ice at 0 °C, 2.50 × 10⁶ J of energy is transferred. What is the specific latent heat of fusion of the substance (Changes of state and specific latent heat). The correct response is 3.33 × 10⁵ J kg⁻¹, because changes of state are explained by particle energy and arrangement. In Changes of state and specific latent heat, the marking point should connect directly to explain that energy transferred during a change of state changes particle potential energy rather than average kinetic energy. 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 427 is distinct because it uses this exact question context and the application lens rather than a generic particle-model sentence.