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Question

What is the physical significance of Gibbs function?

A
Decrease in Gibbs function is the measure of the useful work done by the system.
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B
in crease in Gibbs function is the measure of the useful work done by the system.
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C
decrease in Gibbs function is the measure of the useful heat loss by the system.
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D
None
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Solution

The correct option is A Decrease in Gibbs function is the measure of the useful work done by the system.
Decrease in Gibb's function at constant temperature and pressure in a process gives an estimate or measure of maximum non-PV work (useful work) which can be obtained from system in reversible, manner. The example of non-PV work is electrical work done by chemical battery.

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