girl i don’t do chem but i’m pretty sure If the isentropic work is 80 kJ, then the actual work can be found using the following equation:
Actual work = Isentropic work / Isentropic efficiency
Plugging in the given values, we get:
Actual work = 80 kJ / 0.8 = 100 kJ
Therefore, the actual work of the pump is 100 kJ.