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Gas Constant (R) Definition

Chemistry Glossary Definition of Gas Constant (R)

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The gas constant is used in the Ideal Gas Law equations.

The gas constant is used in the Ideal Gas Law equations.

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Gas Constant Definition: The Gas Constant is the constant in the equation for the Ideal Gas Law:

PV = nRT

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

The value of the gas constant 'R' depends on the units used for pressure, volume and temperature.

R = 0.0821 liter·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

Also Known As: Ideal Gas Constant

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