JAMB Chemistry 2008 Objective — Question 26

Question 26 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2008 Objective paper, with the correct answer and a full explanation.

NH3(g) + HCl(g) -> NH4Cl(s). Since the transformation is from gaseous (most energetic phase) to solid (least energetic phase), there is a decrease in entropy i.e. the entropy change is

A. positive
B. negativeCorrect
C. zero
D. indeterminate

Explanation

Since the transformation is from gaseous (most energetic phase) to solid (least energetic phase), there is a decrease in entropy i.e. the entropy change in the system above is A. positive B. negative C. zero D. indeterminate.

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