Question

what happens when you heat a solid? heating a substance increases its thermal energy. when the particles in a solid have more thermal energy, they vibrate more quickly, and the temperature of the substance goes up. once the substance reaches a certain temperature, called its melting point, the substance can begin to change state. 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 process of heating a solid until it reaches its melting point and changes to a liquid state. During this phase - change, the substance melts and becomes a liquid. The particles in a solid moving far apart is incorrect as in the solid - to - liquid transition, particles remain close together but can slide past one another. The number of particles in a substance does not increase during a phase - change; it is a physical change and not a chemical reaction that would create or destroy particles.

Answer:

The substance melts and becomes a liquid.