Answer to Question #136256 in Mechanical Engineering for dilan

Question #136256
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
Expert's answer
2020-10-04T09:25:38-0400

Dryness fraction of water vapor=0.7,Occupies volume= 0.197

As per first law of thermodynamics

Now on removing we get

1.25=x1.4

x=0.893


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