The value of the universal gas constant $R$ is the same for all gases. What is its physical significance?

(N/A) The unit of $R$ depends upon the units in which $p$,$V$,and $T$ are measured,as $R = \frac{p \cdot V}{n \cdot T}$.
If pressure is measured in $Pa$ (Pascal),volume per mole is measured in $m^3 \cdot mol^{-1}$,and temperature is measured in $K$ (Kelvin),then the units of $R$ are $Pa \cdot m^3 \cdot K^{-1} \cdot mol^{-1}$,which is equivalent to $J \cdot mol^{-1} \cdot K^{-1}$.
Since $J$ (Joule) defines the unit of work done,$R$ represents the work done by the gas per mole per Kelvin.