JAMB Chemistry 2010 Objective — Question 27
Question 27 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2010 Objective paper, with the correct answer and a full explanation.
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27. If a reaction is exothermic and there is a great disorder, it means that A. there will be a large increase in free energy B. there will be a large decrease in free energy C. the reaction is static D. the reaction is in a state of equilibrium
- A. there will be a large increase in free energy
- B. there will be a large decrease in free energyCorrect
- C. the reaction is static
- D. the reaction is in a state of equilibrium
Explanation
An exothermic reaction has a negative delta H. The free energy change delta G = delta H - T delta S. If delta H is negative and there is a great disorder (delta S is large), delta G will unequivocally be negative, i.e. there will be a large decrease in free energy.
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