Clausius Vapor Pressure At T
Compute the vapor pressure at a second temperature from the Clausius-Clapeyron relation using a reference pressure and enthalpy of vaporization.
Description
Compute the vapor pressure at a second temperature from the Clausius-Clapeyron relation using a reference pressure and enthalpy of vaporization.
Clausius Vapor Pressure At T: Compute the vapor pressure at a second temperature from the Clausius-Clapeyron relation using a reference pressure and enthalpy of vaporization.
When to use Clausius Vapor Pressure At T
Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.
- Reference vapor pressure P1 (hPa)
- Required number input.
- Enthalpy of vaporization (J/mol)
- Required number input.
- Reference temperature T1 (K)
- Required number input.
- Target temperature T2 (K)
- Required number input.
How Clausius Vapor Pressure At T works
Compute the vapor pressure at a second temperature from the Clausius-Clapeyron relation using a reference pressure and enthalpy of vaporization. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- Vapor pressure at T2 (hPa)
- The resulting vapor pressure at t2 returned as a number.
Limitations and assumptions
- Thermodynamic quantities are state- and temperature-dependent and must use consistent reference states and sign conventions. Heat loss, phase changes, non-ideal mixing, path-dependent work, and heat-capacity variation may need separate treatment.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.
References
-
Chemical thermodynamics — Wikipedia contributors
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- Vapor Pressure Clausius-Clapeyron Calculator
Compute P2 = P1 * exp[-dHvap/R * (1/T2 - 1/T1)].