A block of ice with a mass of 2 kg is melted into water. The specific latent heat of fusion for ice is 334,000 J/kg. Calculate the energy transferred during this process (Changes of state and specific latent heat)

668,000 J

Exam lens: Write the relationship, substitute values only when needed, and finish by interpreting the result. This question asks: A block of ice with a mass of 2 kg is melted into water. The specific latent heat of fusion for ice is 334,000 J/kg. Calculate the energy transferred during this process (Changes of state and specific latent heat). The correct response is 668,000 J, 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 calculate energy transferred during melting, freezing, boiling or condensing when mass and specific latent heat are known. 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 395 is distinct because it uses this exact question context and the exam lens rather than a generic particle-model sentence.