\({\pi _{xy}}\, = \,4{\pi _{BaC{l_2}}}\)
\({\pi _{xy}}\, = \,iCRT\)
\({\pi _{xy}}\,\, = \,2CRT\)
\({\pi _{BaC{l_2}}}\, = \,3\, \times \,0.01\,RT\)
\(RT\, = \,12\, \times \,0.01RT\)
\(\frac{{12 \times 0.01}}{2}\, = \,0.06\)
[ઉપયોગ : ${R}=0.083\, {~L}\, bar \,{mol}^{-1} \,{~K}^{-1}$ ]