1. Education

Discuss in my forum

Gas Constant (R) Definition

Chemistry Glossary Definition of Gas Constant (R)

By

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

©2014 About.com. All rights reserved.