What is the heat of formation of $\mathrm{HCl}_{(\mathrm{g})}$ from following equation?…

What is the heat of formation of $\mathrm{HCl}_{(\mathrm{g})}$ from following equation? $\mathrm{H}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{HCl}_{(\mathrm{g})} \Delta_{\mathrm{f}} \mathrm{H}=-194 \mathrm{~kJ}$
  1. $-388 \mathrm{~kJ}$
  2. $-97 \mathrm{~kJ}$
  3. -194 kJ
  4. 194 kJ

Solution

$\Delta \mathrm{H}_{\mathrm{f}}^0=\frac{-194}{2}=-97 \mathrm{~kJ}$

Asked in: MHT CET 2022 (10 Aug Shift 2)

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