What is the ideal gas constant (R) in L·atm/(K·mol)?

The ideal gas constant (R) in the context of ideal gas law applications is most commonly expressed in various units depending on the pressure and volume units used in calculations. In this case, when working with pressure expressed in atmospheres (atm) and volume in liters (L), the appropriate form of R is indeed 0.0821 L·atm/(K·mol).

This particular value is derived from the universal gas constant, which can be converted to match the desired units for specific applications involving gases. The significance of the ideal gas constant lies in its role in the equation PV = nRT, where P represents the pressure, V the volume, n the number of moles of gas, T the temperature in Kelvin, and R the ideal gas constant itself.

The choice of 0.0821 L·atm/(K·mol) ensures that when it is used in calculations along with other variables expressed in liters, atmospheres, moles, and Kelvin, the results will be consistent with the defined physical laws governing gas behavior. This makes it a fundamental constant in both thermodynamics and physical chemistry.