Answer to Question #320197 in Molecular Physics | Thermodynamics for matilda

Question #320197

1 kg of steam at 100 bar and 370℃ expands reversibly in a perfectly thermally insulated cylinder behind a piston until the pressure is 38 bar and the steam is then dry saturated. Calculate the work done


1
Expert's answer
2022-03-30T12:51:02-0400

U=HPVU=H-PV

U1=2998.821000.002416105103=2757.22(KJ/kg)U_1=2998.82-\frac{100*0.002416*10^5}{10^3}=2757.22 (KJ/kg)

Ug=2801.18380.0524672105103=2601.8(KJ/kg)U_g=2801.18-\frac{38*0.0524672*10^5}{10^3}=2601.8 (KJ/kg)

W=U1U2=2757.222601.8=155.42(KJ/kg)W=U_1-U_2=2757.22-2601.8=155.42(KJ/kg)



Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be the first!

Leave a comment