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When heat energy is added, two changes are observed:

Change A: Solid changes phases to a liquid.
Change B: Liquid changes phases to a gas.

What are the names for phase changes A and B?

A is freezing and B is evaporation.
A is freezing and B is condensation.
A is melting and B is evaporation.
A is melting and B is condensation.

1 answer

The correct names for the phase changes are:

A is melting and B is evaporation.

  • Change A (solid to liquid) is called melting.
  • Change B (liquid to gas) is called evaporation.