Using Energy Concepts and the Ideal Gas Model As shown in Fig. P3.117, 20 ft3 of...

Using Energy Concepts and the Ideal Gas Model

As shown in Fig. P3.117, 20 ft³ of air at T₁ = 600°R, 100 lbf/in.² undergoes a polytropic expansion to a final pressure of 51.4 lbf/in.² The process follows pV^1.2 = constant. The work is W = 194.34 Btu. Assuming ideal gas behavior for the air, and neglecting kinetic and potential energy effects, determine

(a) the mass of air, in lb, and the final temperature, in °R.

(b) the heat transfer, in Btu.