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# R - Gas Constant

MichaelBartmess.R - Gas Constant

Gas constant from the Ideal Gas Law expressed in units of Joules / (moles * Temperature). However, this constant does not have vCalc Units.

The **Gas Constant (R)** from the Ideal Gas Law is 8.314462 Joules / (moles • Kelvin). The **gas constant** (also known as the **molar**, **universal**, or **ideal gas constant**, denoted by the symbol *R* or *R*) is a physical constant which is featured in many fundamental equations in the physical sciences, such as the ideal gas law and the Nernst equation.

**Ideal Gas Law**: PV = nRT (Click any Parameter)

**P = n•R•T / V :**Ideal Gas Law solved for pressure.**V = n•R•T / P :**Ideal Gas Law solved for volume.**n = (P•V)/(R•T) :**Ideal Gas Law solved for number of mole.**T = (P•V)/(n•R) :**Ideal Gas Law solved for temperature.

It is equivalent to the Boltzmann constant, but expressed in units of energy (i.e. the pressure-volume product) per temperature increment per *mole* (rather than energy per temperature increment per *particle*). The constant is also a combination of the constants from Boyle's law, Charles's law, Avogadro's law, and Gay-Lussac's law.

The Gas Constant (R) appears in many formulas including the following:

- Clausius-Clapeyron Equation: `ln(P_2/P_1) = (DeltaH_(vap))/R * (1/T_1 - 1/T_2)`

#### Reference

- Some descriptive text in the description of the Gas constant comes from Wikipedia: wikipedia/wiki/Gas_constant

**R - Gas Constant**, is used in 1 calculator and 13 equations/constants.

**Calculators**

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