Thermodynamics: property tables HELP

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MEAHH
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Thermodynamics: property tables HELP!

Homework Statement



1 kg of R-134a fills a 0.14m^3 weighted piston cylinder device at a temperature of -26.4C. The container is now heated until the temp is 100C.
Determine the final volume.


The Attempt at a Solution


So the boiling point is -26.1, so it is a saturated vapor to a superheated vapor?
the specific volume is .14m^3
Pressure is constant? Using a T-V graph?
I don't understand how to go about this problem any help would be great!
 

Answers and Replies

  • #2
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At -26.4 C, the initial specific volume is 0.14 m^3/kg. This point needs to be looked up in the thermodynamic tables for the initial pressure. Once the pressure is known, this is also the final pressure. Now, the tables need to be used again to find the specific volume at 100 C and the same pressure. This will be the new volume (since there is 1 kg).
 

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