In a specific heat capacity experiment, a substance is heated and its temperature is recorded over time. Describe how you would interpret a graph showing temperature against time, particularly focusing on the flat sections.

In the graph, the flat sections indicate a change of state where the temperature remains constant despite energy being added. This is because the energy is used to overcome the forces between particles rather than increasing their kinetic energy.

Boundary lens: Keep this separate from nearby specification points that use similar words but test a different idea. This question asks: In a specific heat capacity experiment, a substance is heated and its temperature is recorded over time. Describe how you would interpret a graph showing temperature against time, particularly focusing on the flat sections. The correct response is In the graph, the flat sections indicate a change of state where the temperature remains constant despite energy being added. This is because the energy is used to overcome the forces between particles rather than increasing their kinetic energy., because specific heat capacity links energy, mass, material and temperature change. In Temperature changes in a system and specific heat capacity, the marking point should connect directly to interpret temperature-time data from a specific heat capacity experiment. 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 346 is distinct because it uses this exact question context and the boundary lens rather than a generic particle-model sentence.