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Glossary Science & Engineering

Ideal gas law

The ideal gas law relates pressure, volume, amount and temperature of a gas: `PV = nRT`.

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In more detail

With R = 8.314 J/(mol·K), one mole at 273.15 K and 101,325 Pa occupies 22.41 litres. Temperature must be in kelvin: add 273.15 to degrees Celsius.

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Ideal Gas Law Calculator

Solve PV = nRT for pressure, volume, amount of gas or temperature with units such as atm, kPa, bar, psi, litres, moles, Celsius and Kelvin.

See also

  • Glossary Molarity
    Molarity is the concentration of a solution: moles of solute per litre of solution, written M.
  • Cheat sheet Physics & Chemistry Formulas Cheat Sheet
    Density, weight, moles, molarity, dilution, the ideal gas law, projectile range and half-life.
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