Question

Which of the following describes what occurs as a solid becomes a liquid?

-A chemical change occurs; the particles of the solid vibrate more slowly and their kinetic energy decreases.
-A chemical change occurs; the particles of the solid vibrate faster and their kinetic energy increases.
-A physical change occurs; the particles of the solid vibrate more slowly and their kinetic energy decreases.
-A physical change occurs; the particles of the solid vibrate faster and their kinetic energy increases.

Answer 1

Phase changes are physical changes, because there is no change in the chemical structure of the matter. And as the solid becomes a liquid, there is more movement of the particles (which means higher kinetic energy). So the last option is the answer.

Answer 2

thank you

Answer 3

Was this right ?