DONE in case of Isothermal System is given by:\(W = {P_1}{V_1}\ln \frac{{{V_2}}}{{{V_1}}}\)Where, P1 = Initial Pressure in a System, V1 = Initial Volume in a System, V2 = Final Volume in a System.Calculation:Given:P1 = 0.8 MPA = 800 kPa, V1 = 0.015 m3, V2 = 0.030 m3.Work done in case of Isothermal System is given:\(W = {P_1}{V_1}\ln \frac{{{V_2}}}{{{V_1}}}\)W = \(800 \times 0.015 \times \ln \frac{{0.030}}{{0.015}}\)W = 8.317 KJ \( \approx \) 8.32 kJ.