Polytropic Process

Ideal gas undergoes a reversible-adiabatic process; the path followed by the system is given by

=constant

(8.10)

and the work done per kg of gas

(8.11)

To generalise,

(8.12)

n is polytropic index ( is the property of the system, also it indicates reversible-adiabatic process)

n = 0, constant pressure process
n = 1, constant temperature process
n = , reversible adiabatic process
n = ,constant volume process