Ideal Gas Law Definition and Equation

Chemistry Glossary Definition of Ideal Gas Law

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The ideal gas law relates temperature, pressure, volume, and amount of a gas. Paul Taylor/Getty Images

Ideal Gas Law Definition:

The Ideal Gas Law is the relationship described by the equation

PV = nRT

where P is pressure, V is volume, n is the number of moles of an ideal gas, R is the ideal gas constant, and T is the temperature.