- 1 From An Initial State Of P 120 Lbf In V 4 104 Ft Lb And 7 1200 R Air Expands Adiabatically In A Piston Cylin 1 (32.86 KiB) Viewed 34 times
1. From an initial state of p₁ = 120 lbf/in², v= 4.104 ft/lb, and 7₁-1200 °R air expands adiabatically in a piston-cylinder system to a final state p2-70 lbf/in² with n=1.2 and the process is considered polytropic. The change in specific internal energy, expressed in Btu/lb, can be represented as u = (0.191) (T₂-T₁) in terms of temperature change. Calculate the final temperature, in °R. The effects of kinetic and potential energy can be ignored. (20 points) 1 ir performed on one pound of water contained in a piston-cylinder T