iran-konkur 2020 Q219

iran-konkur · Other · konkur-riazi_1399_specialized_old-curriculum Not Maths
219 -- Which statement is correct?
  1. $\Delta H^\circ$ of fusion of every substance is greater than its $\Delta H^\circ$ of vaporization.
  2. $\Delta H^\circ$ of fusion and vaporization of water are greater than those of benzene.
  3. Intermolecular forces play an important role in determining $\Delta H^\circ$ of fusion and vaporization.
  4. The difference between $\Delta H^\circ$ of fusion and $\Delta H^\circ$ of vaporization of ice, compared to many liquids and gases, is smaller.
\textbf{219 --} Which statement is correct?

\begin{enumerate}
    \item $\Delta H^\circ$ of fusion of every substance is greater than its $\Delta H^\circ$ of vaporization.
    \item $\Delta H^\circ$ of fusion and vaporization of water are greater than those of benzene.
    \item Intermolecular forces play an important role in determining $\Delta H^\circ$ of fusion and vaporization.
    \item The difference between $\Delta H^\circ$ of fusion and $\Delta H^\circ$ of vaporization of ice, compared to many liquids and gases, is smaller.
\end{enumerate}