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![[Post New]](/templates/default/images/icon_minipost_new.gif) 26 Mar 2007 20:06:49 IST
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Two cylinders A and B fitted with pistons contain equal amounts of an ideal diatomic gas at 300 K.Teh piston of A is free to move,while that of B is held fixed.Same amount of heat is given to the gas in each cylinder.If the rise in temperature of the gas in A is 30 K,then what is the rise in temperature of the gas in B? Thanks, Ram.
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if u have failed,dont be dissapointed,coz uve learnt one way how u cant succeed..n never stop tryin..coz perseverence pays!! |
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26 Mar 2007 20:15:45 IST
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hey is the answer 50 K ?? also, r u sure this is the complete question . bcoz i had to assume that gas A expands isobarically !!
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26 Mar 2007 20:31:19 IST
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hey its correct
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27 Mar 2007 09:43:50 IST
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Since piston in A is free to move , hence the process in A is isobaric.
Hence heat given to cylinder A = nCp( T) = 30nCp
Since piston B is held fixed , hence the process in B is isochoric.
Hence heat given to cylinder B = nCv(T) = nCv(T)
Since same amount of heat is given :
nCv(T) = 30nCp
T = (Cp/Cv)30 = (7/5)30 = 42 K (for diatomic gases Cp/Cv = 7/5)
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Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur
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27 Mar 2007 12:59:06 IST
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brilliant.
btw this is the first solved problem of the fiitjee study package.
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27 Mar 2007 17:49:33 IST
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thanx a lot bipin..
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