21A more specific one dear....
Wich differentiates bw ACITVITY - NON-ACtivity OF VIBRATIONAL degrees of FREDDOM
Wat's da the formula connectin various degreees of freedom
(viz. Trans Rot. and Vib.) with Cv ?
[7] [7]
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10 Answers
1Cv=3/2nRΔT
Cv=dU/dT=fR/2=R/γ-1
γ=Cp/Cv=1+2/f
f is the degree of freedom
211i think u r asking 4 the following
that the diatomic gas has 7 degrees of freedom(3tanslational,2rotational ,2vibrational)
f=6(all vibrations) at high temperatures
Actually the vibrational mode depends upon the temperature
4 JEE
u need to remember that
f=3 (translational mode)
f=5 (for diatomic)
or if a question comes they will ask degree of freedom or
it would be given
13Now do this problem n1moles of monoatomic gas is mixed with n2moles of diatomic gas. find degrees of freedom of the mixture....
i like this one....
1n1+n2 = n1 + n2
---------- ----- ----
γ-1 γ1-1 γ1-1
for monoatomic gas f=3
so
f=1/γ-1
=>3=1/γ-1
γ1=4/3
γ2=6/5
put the values to get ur answer
