Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Boiling point (K)

Required number input.

Estimate the enthalpy of vaporization from the boiling point using Trouton's rule with a 85 J/(mol·K) entropy 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]

Enthalpy of vaporization (kJ/mol)

The resulting enthalpy of vaporization returned as a number.

• 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.

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.

• Trouton Rule Calculator

  Estimate enthalpy of vaporization via Trouton rule dHvap = 85*Tb J/mol.

• Boiling Point Clausius-Clapeyron Calculator

  Solve for T2 from the Clausius-Clapeyron equation.

• Boiling Point Elevation

  Estimate boiling point elevation from molality, the ebullioscopic constant, and the van 't Hoff factor.