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NEET2007ChemistryThermodynamics (C)Actual

A reaction occurs spontaneously if

Options

  1. AT S H and both H and S are + ve
  2. BT S H and both H and S are + ve
  3. CT S= H and both H and S are + ve
  4. DT S H and H is + ve and S is - ve

Correct answer

B. T S H and both H and S are + ve

Step-by-step solution

The spontaneity of reaction is based upon the negative value of G, G is based upon T, S and H according to following equation (Gibbs-Helmholtz equation) G= H-T S If the magnitude of H-T S is negative, then the reaction is spontaneous. when T S H and H and S are + ve, then G is negative.

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