Answer to Question #128454 in Mechanical Engineering for Afra Syab

Question #128454
A rigid vessel contains water at 400°F. Heat is to be added so that the water passes through the critical point. What should the quality be at the temperature of 400"F? Am. 0.01728
Expert's answer

Initial Temperature (T1)=400F=(5/9)(400-32)=204.44 C

If steam is heated at constant volume (in a rigid vessel) to teach critical point(Tc=374C),

T1=204.44C, T2=374C

From steam table :

At critical point specific volume(v2)=0.003105m3/kg

Therefore specific volume at initial state(v1)=(v2)=0.003105 m3/kg

At, T1=204.44C.

vf=0.001164 m3/kg, vg=0.11508 m3/kg

Quality of steam(X) at T1=204.44 C is given by

v1=vf+X(vg-vf)=0.001164+X(0.11508-0.001164 )=0.003105


Ans: Quality of steam at T1=4000F is X=0.01711

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Assignment Expert
23.12.20, 11:36

Dear Jevens Mark, Questions in this section are answered for free. We can't fulfill them all and there is no guarantee of answering certain question but we are doing our best. And if answer is published it means it was attentively checked by experts. You can try it yourself by publishing your question. Although if you have serious assignment that requires large amount of work and hence cannot be done for free you can submit it as assignment and our experts will surely assist you.

Jevens Mark
10.11.20, 06:01

How did you get the T2=374C?

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