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Using your previous knowledge of intermolecular forces, explain why Iodine, Paraffin, Sucrose, and Sodium chloride melted in that particular order.

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The increasing order in the melting point is Iodine, Paraffin, Sucrose, and Sodium chloride due to the relative strength of the intermolecular forces.

What is melting?

Melting is a phase change from the solid to the liquid state.

Since the molecules are further apart, the higher the intermolecular forces, the more energy is required for the melting, and the higher the melting point.

We have 4 substances with different kinds of intermolecular forces (IMF):

  • Iodine: It is nonpolar and the IMF are dispersion forces.
  • Paraffin: It is nonpolar and the IMF are dispersion forces.
  • Sucrose: It is polar and the IMF are dipole-dipole.
  • Sodium chloride: It is ionic and the IMF are ion-ion.

What is the order of strength of IMF?

The increasing order of strength of IMF is:

dispersion forces < dipole-dipole < ion-ion

Iodine and paraffin both have dispersion forces, but paraffin is bigger so there are more intermolecular forces.

The increasing order in the melting point is Iodine, Paraffin, Sucrose, and Sodium chloride due to the relative strength of the intermolecular forces.

Learn more about intermolecular forces here: https://brainly.com/question/13588164

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