Heat of Vaporization Calculator

Calculate Phase Change Energies for Vaporization

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Heat of Vaporization Energy Calculator

Calculate energy required for liquid to gas phase change.

Energy Required: - J

Heat of Vaporization Calculator

Calculate heat of vaporization from energy and mass data.

Heat of Vaporization: - J/g

Clausius-Clapeyron Calculator

Calculate vapor pressure changes using the Clausius-Clapeyron equation.

Final Pressure: - atm

Total Phase Change Energy Calculator

Calculate total energy including heating, vaporization, and gas phase.

Initial Heating

Phase Change

Gas Phase

Total Energy: - J

Understanding Heat of Vaporization

What is Heat of Vaporization?

Heat of vaporization is the energy required to convert a liquid to gas at its boiling point. Key concepts include:

  • Phase transition energy
  • Intermolecular forces
  • Boiling point
  • Vapor pressure
  • Molecular kinetics

Common Values

Heat of vaporization varies by substance:

  • Water: 2260 J/g
  • Ethanol: 846 J/g
  • Mercury: 357 J/g
  • Ammonia: 4810 J/g
  • Oxygen: 199 J/g

Factors Affecting Vaporization

Important influences include:

  • Temperature
  • Pressure
  • Surface area
  • Molecular mass
  • Intermolecular forces
  • Environmental conditions

Applications

Heat of vaporization is used in:

  • Distillation processes
  • Industrial cooling
  • Weather prediction
  • Chemical separation
  • Energy systems
  • Refrigeration

Advanced Topics

Related concepts include:

  • Clausius-Clapeyron equation
  • Critical point phenomena
  • Vapor-liquid equilibrium
  • Enthalpy diagrams
  • Phase transitions
  • Thermodynamic cycles

Essential Heat of Vaporization Formulas

Vaporization Energy

Q = m × ΔHvap

Heat of Vaporization

ΔHvap = Q/m

Clausius-Clapeyron

ln(P2/P1) = -(ΔHvap/R)(1/T2 - 1/T1)