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Which of the following reactions is associated with
P negative change in entropy?

W
(1) \( 2 \mathrm{SO}_{3}(\mathrm{~g}) \rightarrow 2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \)
(2) \( \mathrm{C}_{2} \mathrm{H}_{6}(\mathrm{~g}) \rightarrow \mathrm{C}_{2} \mathrm{H}_{4}(\mathrm{~g})+\mathrm{H}_{2}(\mathrm{~g}) \)
(3) \( 2 \mathrm{C}\left(\mathrm{s}\right. \), graphite) \( +\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{CO}(\mathrm{g}) \)
(4) \( 3 \mathrm{C}_{2} \mathrm{H}_{2}(\mathrm{~g}) \rightarrow \mathrm{C}_{6} \mathrm{H}_{6}(l) \)
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