Vapor Pressure
- Page ID
- 3099
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Chemical Concept Demonstrated
- Vapor molecules are molecules that have overcome various intermolecular forces to leave the liquid phase. When heat is applied to the liquid, more molecules gain the energy required to become vapor. This increase in the rate of evaporation shifts the equilibrium of the vapor pressure, causing more molecules to participate in evaporation and condensation. As a result, the vapor pressure increases.