GATE ME 2018 Set 1 — Question 54
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Thermodynamics → Laws & Properties → Pure Substances & Phase Change
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Question
A tank of volume 0.05 m contains a mixture of saturated water and saturated steam at 200 C. The mass of the liquid present is 8 kg. The entropy (in kJ/kg K) of the mixture is ___________ (correct to two decimal places).Property data for saturated steam and water are:
At 200 C, MPa
At 200 C, MPa
| Property | Value |
|---|---|
| 0.001157 m/kg | |
| 0.12736 m/kg | |
| 4.1014 kJ/kg K | |
| 2.3309 kJ/kg K |
Correct answer
2.45 to 2.55
Solution
Given:
Total volume, m
Mass of liquid, kgVolume of liquid, m
Volume of steam, mMass of steam, kg
Total mass, kgDryness fraction, Specific entropy of the mixture:
kJ/kg K.Rounding to two decimal places, kJ/kg K.
Total volume, m
Mass of liquid, kgVolume of liquid, m
Volume of steam, mMass of steam, kg
Total mass, kgDryness fraction, Specific entropy of the mixture:
kJ/kg K.Rounding to two decimal places, kJ/kg K.
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