Constant Volume Specific Heat

  • Thread starter melanie
  • Start date
  • #1
1
0
Just trying to locate specific heat constants with constant volume (not pressure), any ideas where to find this?
 

Answers and Replies

  • #2
If you have a thermodynamic set of property tables it would be in the column with Cv (v should be a subscript) if you are looking at Cp that is the specific heat at constant pressure. They should be fairly close in most non-extreme conditions so becareful what your looking at
 
  • #3
538
2
[itex]C_p[/itex] : Specific Heat at constant pressure
[itex]C_v[/itex] : Specific Heat at constant volume

Also [itex]C_p - C_v = R[/itex]

[itex]\frac {C_p}{C_v} = lamda[/itex]

where lamda = [itex]1 + \frac {2}{f}[/itex]

Where f=degrees of freedon

for monoatomic gas , f=3
for diatomic gas , f=3

You can solve for two expressions at the top to get Cp

BJ
 
  • #4
231
1
One correction to Dr.Brain's post. f for diatomic gases is 5
 
  • #5
siddharth
Homework Helper
Gold Member
1,130
0
quark said:
One correction to Dr.Brain's post. f for diatomic gases is 5
And that's only at around room temperature's where the vibrational degree of freedom is absent. At high temperatures, f will be 7 for diatomic gases.
 

Related Threads on Constant Volume Specific Heat

  • Last Post
Replies
4
Views
4K
Replies
10
Views
13K
Replies
3
Views
2K
Replies
3
Views
2K
Replies
3
Views
4K
  • Last Post
Replies
2
Views
1K
Replies
10
Views
44K
  • Last Post
Replies
8
Views
665
Top