Air expands in an air turbine from a pressure of 50 psia and a temperature of 600°F to an exhaust pressure of 20 psia. Assume the process is reversible and adiabatic with negligible changes in kinetic and potential energy. Find:
1) What is the specific volume of the gas before the turbine?
2) What is the specific volume of the air after the turbine?
3) By what factor (multiplier) is wd greater than work