What is the specific latent heat of vaporisation ? P43-030 Changes of state and specific latent heat checkpoint

The correct answer is Energy needed to change one kilogram of a liquid to gas ? P43-030 density measurement and calculation.

Graph lens: Read the trend, flat section, gradient, or axis labels before explaining the physical meaning. This question asks: What is the specific latent heat of vaporisation ?. The correct response is Energy needed to change one kilogram of a liquid to gas ? P43-030 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 387 is distinct because it uses this exact question context and the graph lens rather than a generic particle-model sentence.