Thermodynamics: property tables HELP

  • Thread starter MEAHH
  • Start date
  • #1
10
0
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 dont understand how to go about this problem any help would be great!
 

Answers and Replies

  • #2
20,771
4,501
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).
 

Related Threads on Thermodynamics: property tables HELP

  • Last Post
Replies
1
Views
607
  • Last Post
Replies
7
Views
4K
  • Last Post
Replies
1
Views
803
Replies
2
Views
1K
Replies
5
Views
4K
Replies
5
Views
5K
Replies
3
Views
875
Replies
2
Views
2K
  • Last Post
Replies
0
Views
3K
  • Last Post
Replies
8
Views
3K
Top