Is The Expression For Work Of A Polytropic Process Restricted To Processes Of An Ideal Gas?

Is The Expression For Work Of A Polytropic Process Restricted To Processes Of An Ideal Gas? Process Exponent n Isothermal & ideal gas 1 Adiabatic & ideal gas k = CP/CV Which one is the correct equation for work done during the polytropic process of ideal gases where n polytropic index? γ>n>1. What is the