Reading properties from a steam table

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SUMMARY

The discussion focuses on the absence of the specific volume of the liquid (Vf) in a steam table at 0.1 bar. Participants suggest referring to alternative resources, such as the Cengel tables, for Vf values. Additionally, a calculation method is provided, where specific volume (v) can be derived using the formula v = (h - u)/p, where h is enthalpy, u is internal energy, and p is pressure. This highlights the importance of using comprehensive steam tables for accurate thermodynamic properties.

PREREQUISITES
  • Understanding of thermodynamic properties, specifically enthalpy and internal energy.
  • Familiarity with steam tables and their applications in thermodynamics.
  • Basic knowledge of pressure and specific volume calculations.
  • Experience with using resources like Cengel for thermodynamic data.
NEXT STEPS
  • Research how to use Cengel steam tables for specific volume calculations.
  • Learn about the derivation and application of the formula v = (h - u)/p in thermodynamics.
  • Explore the significance of Vf in phase change analysis and its implications in engineering.
  • Investigate other thermodynamic tables and their completeness in providing necessary properties.
USEFUL FOR

Engineers, thermodynamics students, and professionals working with steam systems who require accurate calculations of specific volumes and thermodynamic properties.

physea
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Hello!
I see this Steam table:
upload_2018-2-10_19-49-22.png

upload_2018-2-10_19-50-6.png


It shows Vg but not Vf. It mentions some equations at the bottom. Does anyone know how much is Vf for 0.1bar?
 

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you could widen the question: does anyone know what You mean with Vf? ?

if you want the specific volume of the liquid, find another table that shows it...e.g. cengel
 
Last edited:
I would expect a table such as this to list vf. However since u = h - pv, then
v by calculation is: v = (h - u)/p.
 

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