Post-UTME Chemistry 2018 Objective — Question 6
Question 6 of 21 from the Post-UTME Screening (Post-UTME) Chemistry 2018 Objective paper, with the correct answer and a full explanation.
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2H2(g) + O2(g) -> 2H2O(g). The entropy change, delta S, for the above reaction is
- A. positive
- B. negativeCorrect
- C. zero
- D. constant
Explanation
The reaction reduces the number of gas moles from 3 to 2, decreasing disorder, so the entropy change is negative.
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