Which of the following has a positive enthalpy of formation? (A) \( \mathrm{NH}_{3}(\mathrm{~g})...

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Which of the following has a positive enthalpy of formation?
(A) \( \mathrm{NH}_{3}(\mathrm{~g}) \)
(B) \( \mathrm{COCl}_{2}(\mathrm{l}) \)
(C) \( \mathrm{S}_{2} \mathrm{Cl}_{2}(\mathrm{~s}) \)
(D) \( \mathrm{HN}_{3} \)
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