Consider the figure provided. $1 \mathrm{~mol}$ of an ideal gas is kept in a cylinder, fitted with a piston, at the position A, at $18^{\circ} \mathrm{C}$. If the piston is moved to position $\mathrm{B}$, keeping the temperature unchanged, then '$\mathrm{x}$' $\mathrm{L}$ atm work is done in this reversible process. $\mathrm{x}=$$\underline{\hspace{2cm}}$$\mathrm{L}$ atm. (nearest integer) [Given : Absolute temperature $$={ }^{\circ} \mathrm{C}+273.15, \mathrm{R}=0.08206 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}{ }^{-1} \mathrm{~K}^{-1}$$]