### Formula

P2

vapor pressure of interest at T2

T2

the corresponding temperautre

T1

the temperature at anther point

P1

the corresponding vapor pressure at the known temperature T1

DeltaHvap

the molar enthalpy of vaporization

P2

vapor pressure of interest at T2

T2

the corresponding temperautre

T1

the temperature at anther point

P1

the corresponding vapor pressure at the known temperature T1

DeltaHvap

the molar enthalpy of vaporization

The Clausius-Clapeyron equation for the liquid-vapor boundary may be used in either of two equivalent forms. This can be used to predict the temperature at a certain pressure, given the temperature at another pressure, or vice versa.

T2

T1

P1

DeltaHvap

P2

Precision

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