Chemistry / Chem 1424 · Atom · ~20 seconds
The Clausius-Clapeyron Relation
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The Clausius-Clapeyron equation relates a liquid's vapor pressure to its kelvin temperature and enthalpy of vaporization, plotting as a line in logarithmic form.
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Vapor pressures at two different temperatures are enough to calculate a liquid's enthalpy of vaporization from this one relationship.
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Temperature must enter in kelvin — using Celsius produces a result with no physical meaning.