The **Clausius-Clapeyron Equation** establishes a quantitative relationship between **vapor pressure** and **temperature**.

## Clausius-Clapeyron Equation Concept 1

Vapor Pressure looks at the equilibrium established between vaporization and condensation. By using the Clasius-Clapeyron equation, the enthalpy of vaporization can be determined.

## Clausius-Clapeyron Equation Concept 2

Linear Form of Clausius-Clapeyron Equation used when given a plot of lnP vs inverse of Temperature.

## Clausius-Clapeyron Equation Example 1

Vapor pressure measurements at various temperature values are given below. Determine the molar heat of vaporization for cyclohexane.

## Clausius-Clapeyron Equation Concept 3

Two-Point Form of Clausius-Clapeyron Equation used when 2 Temperatures and 2 Pressures are involved.

## Clausius-Clapeyron Equation Example 2

Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1°C. At what temperature does benzene boil when the external pressure is 405 torr?

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