If a reaction involves only solids and liquids which of the following is true?

If a reaction involves only solids and liquids which of the following is true?
  1. $\Delta \mathrm{H} < \Delta \mathrm{E}$
  2. $\Delta \mathrm{H}=\Delta \mathrm{E}$
  3. $\Delta \mathrm{H}>\Delta \mathrm{E}$
  4. $\Delta \mathrm{H}=\Delta \mathrm{E}+\Delta \mathrm{nRT}$

Solution

$\Delta \mathrm{H}=\Delta \mathrm{E}+\mathrm{P} \Delta \mathrm{V}$, for solid and liquid, $\Delta \mathrm{V}=0$
or $\Delta \mathrm{H}=\Delta \mathrm{E}+\Delta \mathrm{nRT}$, for solids and liquids
$\Delta \mathrm{n}=0$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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