Question

For a reaction involving only liquid reactants & liquid products the relationship between $\Delta H$ and $\Delta E$ is:

• A. $\Delta H>\Delta E$
• B. $\Delta H<\Delta E$
• C. $\Delta H=\Delta E$
• D. $\Delta E\ge \Delta H$

Answer 1

The correct option is C $\Delta H=\Delta E$

$\Delta H=\Delta E+\Delta n_{g}RT$

The two quantities vary only because of difference in no. of moles of gaseous species. Since it does not involve gaseous species, so, both are same.

$\Delta n_g=O$

$\therefore \Delta H=\Delta E$