Molar gas constant

In chemistry and physics, the molar gas constant R is a physical constant with the value:   8.314 472  J mol⁻¹K⁻¹.

The constant R is equal to the Boltzmann constant times Avogadro's constant: R = k_BN_A.

The constant arises in equations of state, most notably in the ideal gas law

$R={\frac {pV_{m}}{T}},$

where p is the pressure, V_m the molar volume, and T the absolute temperature of the ideal gas.