A 2 kg block of ice absorbs 6000 J of energy as it melts. Calculate the specific latent heat of fusion for the ice (Changes of state and specific latent heat)

3000 J/kg

Unit lens: Check the units before giving the final statement so the physics quantity is not swapped. This question asks: A 2 kg block of ice absorbs 6000 J of energy as it melts. Calculate the specific latent heat of fusion for the ice (Changes of state and specific latent heat). The correct response is 3000 J/kg, 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 specific latent heat when energy transferred and mass 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 409 is distinct because it uses this exact question context and the unit lens rather than a generic particle-model sentence.