Vapour pressure

Vapour Pressure:


The pressure exerted by a vapor in equilibrium with its liquid or solid phase.


Key points:


1. Temperature dependence: Vapour pressure increases with temperature.

2. Substance-specific: Different liquids have unique vapour pressures.


Applications:


1. Boiling point determination

2. Evaporation and distillation processes

3. Weather forecasting (humidity and evaporation)


Real-life example:

Water boils at 100°C (212°F) at standard atmospheric pressure, where vapour pressure equals atmospheric pressure.


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