How would you expect the melting point of C[$X]₄ to compare to that of [$I][$X]? A)It should be lower because [$I][$X] forms an extended ionic crystal lattice,whereas C[$X]₄ is a covalently-bonded small molecule. B)It should be similar since they are both ionic solids. C)It should be higher because the bonds are stronger due to the higher charge on C (+4). D)It should be higher because C[$X]₄ is larger than [$I][$X]. E)It is not possible to say anything about their melting points without more information.

Question

Quizplus · Accepted Answer

C[$X]₄ is a covalently-bonded small molecule, whereas [$I][$X] forms an extended ionic crystal lattice. Covalent bonds are generally weaker and have lower melting points than ionic bonds. Therefore, we would expect C[$X]₄ to have a lower melting point than [$I][$X].

How Would You Expect the Melting Point of C[$X]4 to Compare

How Would You Expect the Melting Point of C[$X]₄ to Compare