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![[Post New]](/templates/default/images/icon_minipost_new.gif) 16 Feb 2008 18:29:07 IST
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dq=du+dw
dq=0 for adibiatic
0=du+dw
d(pv)=nrt
pdv+vdp = nrdt
ndt = (pdv + vdp)/r
since
du = nCvdt
dw = pdv
0 = nCvdt + pdv
0 = Cv[(pdv+vdp)/r]+pdv
pdv [1+Cv/r] = -CvVdp/r
pdv Cp/r = -Cv Vdp/r
by intigrating
Cp logV = -Cv logP + logk
Cp Cv
logV + logP = log k
P^Cv * V^Cp = k
Cp/Cv
P^ = k
by comparing with P^Y=c
Y=cp/cv
i think it is useful for u
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