Which option best answers the gas collision explanation checkpoint for Calculate energy transferred during melting, freezing, boiling or condensing when mass and specific latent heat are known. in Changes of state and specific latent heat?

The correct answer is Gas pressure is caused by particles colliding with container walls. (gas collision explanation)..

Boundary lens: Keep this separate from nearby specification points that use similar words but test a different idea. This question asks: Which option best answers the gas collision explanation checkpoint for Calculate energy transferred during melting, freezing, boiling or condensing when mass and specific latent heat are known. in Changes of state and specific latent heat. The correct response is Gas pressure is caused by particles colliding with container walls. (gas collision explanation)., 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 394 is distinct because it uses this exact question context and the boundary lens rather than a generic particle-model sentence.