What is the Work Done?
Let us see what is the work done in an isothermal process. For a reversible process, the expression for work done, is given by the following equation:
Wiso = - nRT ln (Vfinal / Vinitial )
Here, Wiso is the work done in an isothermal process, Vfinal is the final volume, and Vinitial is the initial volume of the system, that undergoes an isothermal change.