Given
The internal energy of an expanding gas changes by U=2000J.
To find
The work done
Explanation
Since the work done is adiabatic so the change in heat is zero.
By first law of thermodynamics,
[tex]\begin{gathered} U=Q+W \\ \Rightarrow2000+0+W \\ \Rightarrow W=2000J \end{gathered}[/tex]Conclusion
The work done is 2000J
