JAMB Chemistry 2010 Objective — Question 26
Question 26 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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In which of the following is entropy change positive?
- A. Addition of concentrated acid to water
- B. Dissolution of sodium metal in water
- C. Thermal dissociation of ammonium chlorideCorrect
- D. Reaction between an acid and a base
Explanation
The thermal dissociation of ammonium chloride (a solid decomposing into gases) shows an increase in disorder, giving a positive entropy change.
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