Consider the figure provided. 1 mol of an ideal gas is kept in a cylinder, fitted with a piston, at the position A, at $$18^{\circ}$$ C. If the piston is moved to position B, keeping the temperature unchanged, then ' x ' L atm work is done in this reversible process. x= _____ L atm. (nearest integer) [Given : Absolute temperature = $\left.{ }^{\circ} \mathrm{C}+273.15, \mathrm{R}=0.08206 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}{ }^{-1} \mathrm{~K}^{-1}\right]$