107 514
Assignments Done
100%
Successfully Done
In September 2023

Answer to Question #136167 in Mechanical Engineering for dilan

Question #136167
An amount of water vapor with x = 0.7, occupies a volume of 0.197 m3 at a pressure of 1.4 MPa. If the pressure is kept constant, determine the heat that enters the system to make the steam exactly in a dry saturation state (x = 1, meaning it's all gaseous) and the heat we put into this system is seen as work. If now the volume is kept constant while heat is removed until the pressure drops to 1.25 MPa, then determine the dryness fraction (x) and the heat extracted from the water vapor.
1
2020-10-04T09:24:20-0400

Dryness fraction of water vapor=0.7,Occupies volume =0.197 "m^3" ,"P_1=1.4" MPa,

"V_{fg}=xV_{g}"

"V_g=\\frac {0.197}{0.7}=0.2814 m^3"

"W=pdV=1.4 \\times 10^6\\times (0.2814-0.197)=0.118 \\times 10^6 J=1.18 \\times 10^6 J"

As per thermodynamic law

"dQ=dU+dW,dU=0\ndQ=1.18 \\times 10^6"

Now on removing we get

1.25=x1.4

x=0.893

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!