• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Constant Volume Specific Heat

  • Thread starter melanie
  • Start date
1
0
Just trying to locate specific heat constants with constant volume (not pressure), any ideas where to find this?
 
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
 
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
 
231
1
One correction to Dr.Brain's post. f for diatomic gases is 5
 

siddharth

Homework Helper
Gold Member
1,110
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 for: Constant Volume Specific Heat

Replies
10
Views
11K
Replies
3
Views
980
Replies
3
Views
2K
Replies
1
Views
1K
Replies
2
Views
5K
Replies
2
Views
1K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top