Value of universal gas constant (R) is the same for all gases. What is its physical significance?
The eq. of universal gas constant (R) is R = PV/nRT. Therefore, the unit of R will depend on P, V & T viz, Pa m3 K-1 mol-1 or Jmol-1K-1. Since Joule is the unit of work; therefore, R is the work done by gas mole per kelvin.