Question

If $\Delta$H is the change in enthalpy and $\Delta$E the change in internal energy accompanying a gaseous reaction

• A. $\Delta$H is always greater than $\Delta$E
• B. $\Delta$H <$\Delta$E only if the number of moles of the products is greater than the number of the reactants
• C. $\Delta$H is always less than $\Delta$E
• D. $\Delta$H <$\Delta$E only if the number of moles of the products is less than the number of moles of the reactants

Answer 1

Answer: (D)

$\Delta$H <$\Delta$E only if the number of moles of the products is less than the number of moles of the reactants

Answer 2

If $\Delta$n = – ve than $\Delta$H < $\Delta$E .