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Clausius-Clapeyron Boiling Point Shift Calculator

ln(P2/P1) = −ΔHvap/R · (1/T2 − 1/T1) — vapor pressure vs temperature.

Uses the Clausius-Clapeyron equation to find a new boiling point or vapor pressure at a different temperature given the enthalpy of vaporization.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ln(P2/P1) = −ΔHvap/R × (1/T2 − 1/T1)

In depth

Uses the Clausius-Clapeyron equation to find a new boiling point or vapor pressure at a different temperature given the enthalpy of vaporization.