Answer:
Silicon dioxide \[(Si{{O}_{2}})\] is
a covalent solid in which the atoms are linked by covalent bonds resulting in a
giant crystal. On the other hand, solid carbon dioxide (or dry ice) is a
molecular solid in which the molecules of \[C{{O}_{2}}\] are held together by
weak van der Waa's forces of attraction. Therefore, attractive forces in
silicon dioxide are more than in solid carbon dioxide. As a result, the latent
heat of fusion of the former is more.
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