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Thermal Physics

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15 Mar 2010 09:26:35 IST

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please solve dis...i m new.to dis group

None

A gas undergoes a process such that P is proportional to (1/T). if the molar heat capacity for this process is C=33.24J/mol-K.find the degree of freedom .....

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saharsha kumar keshkar

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Joined: 7 Aug 2008

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15 Mar 2010 09:29:50 IST

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hmmmmm good question...wait

saharsha kumar keshkar

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Joined: 7 Aug 2008

Posts: 1096

15 Mar 2010 09:30:26 IST

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first law of thermodynamics......

we have.......

C=Cv +2R={R/(y-1)}+2R=33.24

substituting the value........y=1.5...(where y=Cp/Cv)

we know...

y=1 + {2/F}...

and getting degree of freedom(F)=4

answer is 4.....

NUDGE ME IF WRONG>>>

arindam

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15 Mar 2010 09:36:44 IST

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it's tricky...

saharsha kumar keshkar

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Joined: 7 Aug 2008

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15 Mar 2010 09:39:18 IST

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for shortcut....remember...

any process of form PV^X=constant...

molar heat capacity is given by.......

so in this process....it is in form of....PV^1/2.....

but basic way is first one.....

i gave u basic becoz...it will clear all ur doubts...in objectives...u can easily dis method...

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