what happens when you heat a solid? heating a...

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 break down and change into other particles. the substance melts and becomes a liquid. the particles in the substance move far apart.

Answer

# Brief Explanations: When a solid is heated to its melting - point, it changes from a solid to a liquid state. During this phase - change, the substance melts and becomes a liquid. The particles gain enough energy to move more freely and slide past one another, which can be misinterpreted as moving far apart compared to their fixed positions in the solid state. However, the particles do not break down and change into other particles during a simple phase - change from solid to liquid. This is a physical change, not a chemical change. # Answer: The substance melts and becomes a liquid.