\(\Delta \mathrm{Q}=\Delta \mathrm{U}+\mathrm{W}\)
\(\Rightarrow+48=\mathrm{nC}_{\mathrm{v}} \Delta \mathrm{T}+\mathrm{W}\)
\(\Rightarrow 48=(1)\left(\frac{3 \mathrm{R}}{2}\right)(2)+\mathrm{W}\)
\(\Rightarrow \mathrm{W}=48-3 \times \mathrm{R}\)
\(\Rightarrow \mathrm{W}=48-3 \times(8.3)\)
\(\Rightarrow \mathrm{W}=23.1 \text { Joule }\)