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Meghna Khadka posted an Question

June 17, 2020 • 16:38 pm

30 points

CSIR NET
Chemical Sciences

Thermodynamics

2 Answer(s)

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Dinesh khalmaniya 1

check it
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Lingareddy 1

Entropy is generated during every irreversible process. Entropy generation associated with irreversibility. It happens due to friction, finite temperature heat transfer and hysteresis effecte etc. As we all know that entropy is a point function but not entropy generation. Entropy generation is a path function because it depends upon the how long we are taking any process. It also depends upon the heat which is to be transfered during the process and we know that heat is path function. It matters that the path which is followed by the process is frictionless or not. If It has less friction then less entropy generation will take place if friction is more then more entropy will generate. But entropy generation can not be less than zero. It may be zero for reversible process but not less than zero.
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Lingareddy 1

The amount of entropy generated depends on the path followed by the process and is characterized by an inequality. Therefore, it doesn’t have a unique value for a process connecting two equilibrium states of the system. Entropy generated = entropy change suffered by the system + entropy change suffered by the surroundings, (algebraic sum). While the first term on RHS does not depend on the path, the second term does. Therefore, LHS is a path function.
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Lingareddy 1

check it
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Dinesh khalmaniya 1

hope this will help you 🙏
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Dinesh khalmaniya 1

ds = dq/T and we know that entropy is path function so dq/T will also be path function
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