G,  Gases & Gas Properties

Gas Constant (R)

The constant used in the ideal gas law equation:

PV = nRT

where P is pressure; V is volume; n is number of moles; and T is temperature.

The gas constant is also known as the ideal gas constant. The value of the gas constant (R) depends on the units used for pressure, volume, and temperature.

Here are R values for various systems of units:

R = 0.0821 L∙atm/mol∙K

R = 8.3145 J/mol∙K

R = 8.2057 m3∙atm/mol∙K

R = 62.3637 L∙Torr/mol∙K or L∙mmHg/mol∙K

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