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JIPMER 2007
Exam
JIPMER
Year
2007
Subject
Chemistry
Chapter
Thermodynamics (C)

JIPMER 2007 · Chemistry · Thermodynamics (C)

Which of the following pairs of a chemical reaction is certain to...

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, ΔH\Delta H is - ve and on increasing disorder, ΔS\Delta S is + ve thus, at these condition, ΔG\Delta G is negative according to following equation. ΔG=ΔH−TΔS\Delta G=\Delta H-T \Delta S ΔG=−\Delta G=- ve. Hence, for spontaneous reaction ΔG\Delta G must be - ve.
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