Why does a change in pressure result in an change of melting point and boiling in a substance?

or:Why does a change in pressure result in an change of melting point and boiling in a substance?or:Because it takes energy to teach the molecules to

or:Why does a change in pressure result in an change of melting point and boiling in a substance?

or:Because it takes energy to teach the molecules to fly. When the molecules in the air push harder on the surface, the molecules in the liquid have to try harder to get airborn.Every liquid has a vapor pressure. Boiling is defined as the vapor pressure going higher than the ambient pressure.

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