Identify the reaction for which $\Delta H \neq \Delta E$ :

Identify the reaction for which $\Delta H \neq \Delta E$ :
  1. $\mathrm{S}$ (rhombic) $+\mathrm{O}_2(\mathrm{~g}) \longrightarrow \mathrm{SO}_2(g)$
  2. $\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{NO}(\mathrm{g})$
  3. $\mathrm{H}_2(g)+\mathrm{Cl}_2(g) \longrightarrow 2 \mathrm{HCl}(g)$
  4. $\mathrm{CO}(g)+\frac{1}{2} \mathrm{O}_2(g) \longrightarrow \mathrm{CO}_2(g)$

Solution

$\Delta H \neq \Delta E$ for $\mathrm{CO}(g)+\frac{1}{2} \mathrm{O}_2(g) \longrightarrow \mathrm{CO}_2(g)$

Asked in: AP EAMCET 2006

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