Questions: Type the following formulas in the boxes below in order of increasing boiling point: ZnS, CO2, CH3CH2OH, CH-Br.

Type the following formulas in the boxes below in order of increasing boiling point: ZnS, CO2, CH3CH2OH, CH-Br.
Transcript text: Type the following formulas in the boxes below in order of increasing boiling point: $\mathrm{ZnS}, \mathrm{CO}_{2}, \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}, \mathrm{CH}_{-} \mathrm{Br}$.
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Solution

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Solution Steps

Step 1: Identify the Types of Intermolecular Forces

To determine the boiling points, we need to identify the types of intermolecular forces present in each compound:

  • $\mathrm{ZnS}$: Ionic bonds
  • $\mathrm{CO}_{2}$: London dispersion forces (nonpolar molecule)
  • $\mathrm{CH}_{3}\mathrm{CH}_{2}\mathrm{OH}$: Hydrogen bonding (polar molecule with -OH group)
  • $\mathrm{CH}_{3}\mathrm{Br}$: Dipole-dipole interactions (polar molecule)
Step 2: Compare the Strength of Intermolecular Forces

The strength of intermolecular forces generally increases in the following order:

  1. London dispersion forces
  2. Dipole-dipole interactions
  3. Hydrogen bonding
  4. Ionic bonds
Step 3: Order the Compounds by Boiling Point

Based on the strength of the intermolecular forces:

  1. $\mathrm{CO}_{2}$ (London dispersion forces)
  2. $\mathrm{CH}_{3}\mathrm{Br}$ (Dipole-dipole interactions)
  3. $\mathrm{CH}_{3}\mathrm{CH}_{2}\mathrm{OH}$ (Hydrogen bonding)
  4. $\mathrm{ZnS}$ (Ionic bonds)

Final Answer

\[ \boxed{\mathrm{CO}_{2}, \mathrm{CH}_{3}\mathrm{Br}, \mathrm{CH}_{3}\mathrm{CH}_{2}\mathrm{OH}, \mathrm{ZnS}} \]

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