Constant Volume Specific Heat


by melanie
Tags: constant, heat, specific, volume
melanie
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#1
Jun29-05, 10:15 PM
P: 1
Just trying to locate specific heat constants with constant volume (not pressure), any ideas where to find this?
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abercrombiems02
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#2
Jun30-05, 12:06 AM
P: 114
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
Dr.Brain
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#3
Jun30-05, 01:24 AM
P: 543
[latex]C_p[/latex] : Specific Heat at constant pressure
[latex]C_v[/latex] : Specific Heat at constant volume

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

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

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

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

quark
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#4
Jul1-05, 12:54 AM
P: 230

Constant Volume Specific Heat


One correction to Dr.Brain's post. f for diatomic gases is 5
siddharth
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#5
Jul1-05, 01:45 AM
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Quote Quote by quark
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.


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