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Steam Thermodynamics Problems

The document contains 8 problems involving steam properties and processes. The problems require using steam tables and Mollier charts to determine state properties like pressure, temperature, specific volume, enthalpy and entropy given other state properties. They involve processes like heating water at constant pressure, isentropic and isothermal changes of steam states.

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John Lester Ocampo
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6K views1 page

Steam Thermodynamics Problems

The document contains 8 problems involving steam properties and processes. The problems require using steam tables and Mollier charts to determine state properties like pressure, temperature, specific volume, enthalpy and entropy given other state properties. They involve processes like heating water at constant pressure, isentropic and isothermal changes of steam states.

Uploaded by

John Lester Ocampo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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1. Steam at a temperature of 250C has a specific volume of 0.15436 m3/ kg.

What are the


pressure, specific internal energy, enthalpy, and entropy?

2. Steam at a pressure of 3.5MPa is known to have a specific volume of 50x10-3 m3/kg.


What is its specific enthalpy?

3. A rigid vessel contains 2kg of steam at 6.35MPa and 375C. Determine its enthalpy in kJ
using steam tables only.

4. A tank contains exactly one kilogram of water consisting of liquid and vapor in
equilibrium at 1MPa. If the liquid and vapor each occupy one half the volume of the tank,
what is the enthalpy of the contents of the tank?

5. Steam at a temperature of 210C has a specific entropy of 7.1167kJ/kgK. Determine the


pressure, internal energy, enthalpy and volume.

6. Saturated steam vapor at 250C moves along its isotherm until the pressure becomes
1MPa. Locate the end state points on the Mollier chart and for each kilogram of steam
processed determine (a) the initial pressure, (b) the change of enthalpy, (c) the change of
entropy.

7. Steam undergoes an isentalpic (h=C) process from 1.5MPa, 350C to 10MPa. Find the
final temperature using the Mollier chart.

8. Consider 1kg of water that is heated at constant pressure (0.50 MPa) from a wet state (x1
= 85%) to 400C. Locate the end state points on the Mollier chart and determine (a) the
change of enthalpy and (b) the change of entropy.

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