One mole of an ideal gas at 300 K is expanded isothermally from 1 L to 10 L volume. Δ U for this process is: (Use R =8.314 J k^-1 mol^-1 )

One mole of an ideal gas at $\displaystyle 300$ K is expanded isothermally from $\displaystyle 1$ L to $\displaystyle 10$ L volume. $\displaystyle \Delta \mathrm{U}$ for this process is: (Use $\displaystyle \mathrm{R}=8.314 \mathrm{~J} \mathrm{k}^{-1} \mathrm{~mol}^{-1}$ )