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If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas, then
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The correct answer is:
$\Delta H < \Delta U$
$\quad \Delta n_{g}=n_{P}-n_{R}=1-2=-1$
Also, $\Delta H=\Delta U+\Delta n_{g} R T$
$\therefore \quad \Delta H-\Delta U=-\mathrm{Re} \quad\left[\quad \Delta n_{g}=-\mathrm{ve}\right]$
$\therefore \quad \Delta M < \Delta U$
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