IS2 - Phase Changes/ Heating Curves

Front

What are the states of matter present at segment C-D in a heating curve?

Back

Liquid

Front

Which line segment represents when the substance is only in the solid state?

Back

A-B

Front

What is the kinetic energy of particles in a solid?

Back

They have a low amount of kinetic energy.

Front

What type of process occurs when gas changes to liquid?

Back

Exothermic because energy is released by the molecules.

Front

What happens to particles when they are heated?

Back

They speed up and spread out.

Front

What is a heating curve?

Back

A graph that shows the temperature change of a substance as it is heated over time.

Front

What occurs at segment B-C in a heating curve?

Back

The substance is melting from solid to liquid.

Front

What is the process called when a liquid turns into a gas?

Back

Vaporization.

Front

What happens to the temperature during a phase change?

Back

The temperature remains constant during a phase change.

Front

What is the term for the energy required to change a substance from solid to liquid?

Back

Heat of fusion.