Post-UTME Chemistry 2015 Objective — Question 5
Question 5 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2015 Objective paper, with the correct answer and a full explanation.
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When ammonium chloride is dissolved in water, the temperature of the solution becomes lower than the initial temperature of the water. It can therefore be inferred that the dissolution is
- A. endothermic and delta H is negative
- B. endothermic and delta H is positiveCorrect
- C. exothermic and delta H is positive
- D. exothermic and delta H is negative
Explanation
A temperature drop indicates heat is being absorbed from the surroundings (endothermic), corresponding to a positive delta H.
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