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NEET2017ChemistryThermodynamics (C)Actual

When the heat of reaction at constant pressure is -2.5 10^3 cal and entropy change is 7.4 cal deg ⁻¹ at 25^ C , the reaction is predicted as

Options

  1. Areversible
  2. Bspontaneous
  3. Cnon-spontaneous
  4. Dirreversible

Correct answer

B. spontaneous

Step-by-step solution

For the reaction at constant pressure, aligned & H=-2.5 10^3 cal & S=7.4 cal deg ⁻¹ & G= H-T S=(-) 2.5 10^3-298 7.4 & =(-) 2.5 10^3-2205.2 & G=-4705 cal & aligned Reaction is spontaneous.

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