- #1
sperrya
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Homework Statement
Find the enthalpy of steam at 0.4 MPa and 0.7 dryness
Homework Equations
The Attempt at a Solution
At a pressure of 0.4MPa dry saturated steam has a total enthalpy of hg = 2,739 kj/kg.
∴ 0.7 kg of steam has an enthalpy of (0.7 x 2,739) = 1917.3 kj
The total heat of 0.3kg of water is 0.3hf (at 0.4MPa), so 0.3 x 604.8 = 181.44 kj
∴ Total heat for wet steam = 181.44 + 1917.3 kj/kg
= 2,098.74 kj/kg
This is my first time using steam tables so am struggling to know if I am gripping it or not. Any help you can offer in order for me to answer this question is VERY much appreciated.
Regards