What is the Polytropic Exponent, n Value for a Singular Repeating Compressor?

[SherlockOhms]

Homework Statement

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< C_p/C_v I could classify it as a polytropic process. However, is n small enough for me to assume it's isothermal?

Homework Equations

PVⁿ = PVⁿ

The Attempt at a Solution

 

[Chestermiller]

Yes.

 

[SherlockOhms]

Thanks.