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.
B) chemical change occurs; the particles of the solid vibrate faster and their kinetic energy increases.
C) physical change occurs; the particles of the solid vibrate more slowly and their kinetic energy decreases.
D) physical change occurs; the particles of the solid vibrate faster and their kinetic energy increases.

Answer 1

Its D

as particles in the solid gain more energy and so they vibrate faster and their kinetic energy increases 

hope that helps

Answer 2

The change of a substance from solid to liquid is an example of a physical change because this involves only phase change. This is different to chemical change which includes also the formation of new substances. The change is due to the faster vibration of particles breaking out from bonds. Answer is D.