Final answer:
The isentropic efficiency of a compressor cannot be calculated with the information provided in the question; additional details about specific heat capacities and energy balance equations are necessary.
Step-by-step explanation:
To determine the isentropic efficiency of the compressor, we use the concept of adiabatic compression of an ideal gas. The isentropic efficiency is defined as the ratio of the work done in a real adiabatic process to the work done in an ideal isentropic process. However, the information provided in the question does not suffice to calculate the isentropic efficiency directly. Detailed energy balance equations or knowledge about the specific heat capacities of argon at constant pressure and volume would be needed. These are typically used along with the inlet and outlet conditions of temperature and pressure to calculate the ideal versus actual work or temperature changes in the compressor.