So, after performing an experiment a number of times, to calculate the efficiency of a singular repeating compressor, I have found n ≈ 1 i.e. it equals 1.01...... in all of my found values. I've now been asked to classify the type of process. Seeing as technically n > 0 and n< Cp/Cv I could classify it as a polytropic process. However, is n small enough for me to assume it's isothermal?
PVn = PVn