Question

changing state. describe what happens to the energy and speed of particles when a substance changes temperature. heating a substance. the energy of the particles, causing them to. cooling a substance. the energy of the particles, causing them to

Explanation:

When a substance changes state, heating it increases the energy and speed of its particles, causing them to move more freely and potentially change state (e.g., from solid to liquid). Cooling a substance decreases the energy of the particles, causing them to move less and possibly change to a more ordered state (e.g., from liquid to solid). Temperature is related to the average kinetic energy of the particles.

Answer:

When a substance changes state, heating it makes the particles gain energy and speed up, which can cause a state - change as they move more freely. Cooling the substance makes the particles lose energy, move more slowly, and can cause a change to a more ordered state.