One Stop GATE Forum: Entropy Change

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    hi friends.... 
In the entropy chapter of thermodynamics it has been formulated that 

(Integral of dQ/T) for a irreversible process < S2 - S1 i.e the change in S; 

my doubt is 
how do they find the value of (Integral of dQ/T) for an irreversible process in the first place??? 
For a reversible process the value can be found by replacing the entire process by infinitesimally small alternate adiabatic and isothermal processes. But the same approach cannot work for an irreversible process, can it?? 
Can anyone please consider and answer my query.... 
Thanx in advance..... 
ALL THE BEST for GATE 2007!!!  

Author	Message
balu Senior Member Joined: 20Feb2007 Online Status: Offline Posts: 236	Topic: Entropy Change Posted: 22Feb2007 at 9:57am
	hi friends.... In the entropy chapter of thermodynamics it has been formulated that (Integral of dQ/T) for a irreversible process < S2 - S1 i.e the change in S; my doubt is how do they find the value of (Integral of dQ/T) for an irreversible process in the first place??? For a reversible process the value can be found by replacing the entire process by infinitesimally small alternate adiabatic and isothermal processes. But the same approach cannot work for an irreversible process, can it?? Can anyone please consider and answer my query.... Thanx in advance..... ALL THE BEST for GATE 2007!!! Post Resume: Click here to Upload your Resume & Apply for Jobs

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