Question

4.1: A piston-cylinder device contains CO2 initially at pi = 0.7 bar, T = 280 K, and Vi=0.262 mp. The gas undergoes a polytropic compression process described by pV1.25= constant to a final pressure p2 = 11 bar. Assume ideal gas behavior and negligible kinetic and potential energy effects. Determine the work and heat transfer for the process (in kJ), using a. constant specific heats evaluated at 300 K b. ideal gas tables (Table A-23) Compare the results and discuss.

answer should be in this format. includ pv/ pt graphs thank you.

Answer 1

1, 6 7 % Corplant ror polytropic frowe, PV = P₂ V 2 - pvn Constant papirn (Wes) only = { por - (Win pory Biv" ) In n - Privy - Pravi (in P2 V 2 – PV vi in 1-n - P2₂ - PV (Wiz Enly Pivke

We know that AU - Q-N a au Recull son ideel you pus met Pdr. MR CTy To), we need to for Polytropie poun, Icons (W) ) R C1,-T). 16.2012 (28 - m-1 0:25 H.-236.34 KJ|

The average value ey= 0.786 KJ / kg . K is assumed for ais. AU = m (Ug-4,) - mov (T2-T.) - Ikg (0.726 kg Ikg.k) (485-280) * (0.186 kJ) (205) - AU = 161-13 kg finally, Q = OU+W = 161.13 kJ -235.34 KJ sa - -74-24 KJ
Answer: