What is Vapor Pressure?
Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid phase:
- Measure of liquid's tendency to vaporize
- Temperature dependent property
- Key factor in distillation
- Important for phase equilibria
Calculate Vapor Pressure and Phase Equilibrium
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Calculate vapor pressure using the Antoine equation.
Calculate vapor pressure change with temperature using the Clausius-Clapeyron equation.
Calculate water vapor pressure at different temperatures.
Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid phase:
The Antoine equation relates vapor pressure to temperature:
Describes pressure-temperature relationship:
Vapor pressure calculations are crucial for:
log₁₀(P) = A - B/(T + C)
Where P is vapor pressure, T is temperature
ln(P₂/P₁) = -(ΔHvap/R)(1/T₂ - 1/T₁)
Where ΔHvap is heat of vaporization
RH = (P/P*) × 100%
Where P* is saturation vapor pressure