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NEET2007ChemistryThermodynamics (C)Actual

Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?

Options

  1. AExothermic and decreasing disorder
  2. BEndothermic and increasing disorder
  3. CExothermic and increasing disorder
  4. DEndothermic and decreasing disorder

Correct answer

C. Exothermic and increasing disorder

Step-by-step solution

If reaction is exothermic, therefore, H is - ve and on increasing disorder, S is + ve thus, at these condition, G is negative according to following equation. G= H-T S G=- ve. Hence, for spontaneous reaction G must be - ve.

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