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\(NH_{3(g)} + HCl_{(g)} → NH_4Cl_{(s)}\) The entropy change in the system above is

Chemistry
JAMB 2008

\(NH_{3(g)} + HCl_{(g)} → NH_4Cl_{(s)}\)
The entropy change in the system above is

  • A. positive
  • B. zero
  • C. negative
  • D. indeterminate
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Correct Answer: Option C
Explanation

\(NH_{3(g)} + HCl_{(g)} → NH_4Cl_{(s)}\)
Reactant = 2 moles of gaseous molecules
Product = 1 mole of gaseous molecule
Entropy change = 1 - 2 = -1 (negative)

There is an explanation video available below.

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Explanation Video

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