Question

The _____ is the _____ change when ___ of a substance melts, changes from the _____ phase to the _______ phase.

A) Temperature, physical, molecules, solid, liquid
B) Pressure, chemical, composition, gas, liquid
C) Heat, chemical, elements, gas, solid
D) Volume, chemical, composition, solid, gas

Answer 1

A phase change is a physical process in which a substance goes from one phase to another. The melting point is the temperature at which a substance goes from a solid to a liquid, while the boiling point is the temperature at which a substance goes from a liquid to a gas.

Step-by-step explanation:

A phase change is a physical process in which a substance goes from one phase to another. The melting point is the temperature at which a substance goes from a solid to a liquid, while the boiling point is the temperature at which a substance goes from a liquid to a gas. The nature of the phase change depends on the direction of the heat transfer. Adding heat changes a substance from a solid to a liquid or a liquid to a gas, while removing heat changes a gas to a liquid or a liquid to a solid.