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Question

Which allotropic form of carbon is thermodynamically the most stable ?

A
Diamond
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B
Graphite
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C
Fullerenes
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D
Coal
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Solution

The correct option is B Graphite
Thermodynamically the most stable allotrope of carbon is Graphite.
It has standard entropy assigned zero.

Graphite contains one delocalized electron per carbon. These cause the greater attraction between carbon atoms hence giving stronger bonds, more stability to the structure.

Hence option B is correct.

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