Question

as more thermal energy is added to the substance, its particles gain enough thermal energy to move around more freely. the particles remain close together, but they are able to slide past one another. when all of the particles have broken out of their fixed positions, the substance has changed state. which of the following happen during this change of state? select all that apply. the particles in the substance move far apart. the number of particles in the substance increases. the substance melts and becomes a liquid.

Explanation:

The text describes the transition from a solid to a liquid state (melting). In this process, particles gain enough energy to move past one another but remain close - they do not move far apart, and the number of particles remains constant due to the law of conservation of mass. Melting is the change of state from solid to liquid.

Answer:

The substance melts and becomes a liquid.