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 substance melts and becomes a liquid. the number of particles in the substance increases.

Explanation:

When a substance changes from solid to liquid (melting), the particles gain enough energy to break out of their fixed positions in the solid - state lattice. The number of particles remains the same during a physical change like melting. The particles move further apart compared to the solid - state and can slide past one another.

Answer:

The particles in the substance move far apart.