Answer to Question #213396 in Molecular Physics | Thermodynamics for Yomna

Question #213396

.Air at 1 bar, 27oC and a rate of 0.4 kg/s enters a 10 cm diameter duct where it 

is heated at constant pressure to reach 727oC at exit. Calculate outlet velocity 

and deduce heat and work exchanged per second.


1
Expert's answer
2021-07-05T16:05:34-0400

Gives


P1=1atm,T1=300K,r1=5cm,mdt=0.4kg/sec,T2=727°c=1000KP_1=1atm,T_1=300K,r_1=5cm,\frac{m}{dt}=0.4kg/sec,T_2=727°c=1000K

We know that

Av=dmdtAv=\frac{dm}{dt}

Put value


A=πr2=3.14×0.052=7.85×103m2A=\pi r^2=3.14\times0.05^2=7.85\times10^{-3}m^2

v=dmdtAv=\frac{\frac{dm}{dt}}{A}

v=0.47.85×103=50.95m/secv=\frac{0.4}{7.85\times10^{-3}}=50.95m/sec


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