Identify the correct statements from the following I. _ r G is zero for A B reaction II. The entropy of pure crystalline solids approaches zero as the temperature approaches absolute zero III. U of a reaction can be determined using bomb ca

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Identify the correct statements from the following I. _ r G is zero for A B reaction II. The entropy of pure crystalline solids approaches zero as the temperature approaches absolute zero III. U of a reaction can be determined using bomb calorimeter

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Correct answer: D. I, II, III

(I) For equilibrium reaction Gibb's free energy i.e G _ r =0 (II) According to third law of thermodynamics, the entropy of pure crystalline solid approaches zero as the temperature approaches absolute zero. This is because there is perfect order in a crystal at absolute zero. (III)For a chemical reactions, heat absorbed at constant volume i.e U is measured in a bomb calorimeter.

Identify the correct statements from the following I. _ r G is zero for A B reaction II. The entropy of pure crystalline solids approaches zero as the temperature approaches absolute zero III. U of a reaction can be determined using bomb calorimeter

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