What are the units typically used for the ideal gas constant R?

The ideal gas constant R is commonly represented in specific units that relate to pressure, volume, and temperature in gas laws. The most frequently used value of R, particularly in the context of the ideal gas law represented as PV = nRT, is expressed in terms of pressure in atmospheres and volume in liters, leading to the units of liter atmospheres per mole Kelvin.

This choice effectively combines the physical dimensions involved in the law: liters correspond to volume, atmospheres denote pressure, moles indicate the amount of substance, and Kelvin reflects the temperature scale used in gas calculations. In this context, each component is essential for accurate computations involving gases under various conditions.

While other choices may suggest valid units, they don't align as closely with the conventional representation of the ideal gas constant in most applications associated with R in the ideal gas law.