Question

1. Check off (V) all the forces that apply to each of the following compounds Compound Intermolecular Force London Forces Hydrogen Bonding Dipole - Dipole BrF Cl2 H.S 2. In the liquid state, disruptive forces are a. roughly of the same magnitude as cohesive forces b. very weak compared to cohesive forces c. dominant over cohesive forces d. None of these 3. Between CIF and ClBr which compound would have a large boiling point? Explain the reason for your choice. 4. Between H20 and NH, which compound would have a large boiling point? Explain the reason for your choice. 5. Between O2 and Iz, indicate which have a higher boiling point? Give the reason for your choice. 6. In the gaseous state, disruptive forces are roughly of the same magnitude as cohesive forces True Falsen 7. What is a volatile liquid The change of state from a gas to a solid is referred to as deposition and the change is considered to endothermic True Falsed Describe the relationship between boiling point and the strength of intermolecular forces:

Answer 1

1. BrF has intermolecular forces of Dipole-Dipole.

because of high electronegativity difference.

Cl2 has intermolecular forces of London force

Because of no electronegativity difference.

H2S has intermolecular forces of Dipole-Dipole.

2.In the liquid state,disruptive forces are roughly of the same magnitude as cohesive forces.

3. ClBr will have larger boiling point than ClF due to high molecular weight.

4. H2O  have larger boiling point than NH3 because H2O have strong Hydrogen bond and more Electronegativity difference than NH3.

5. I2 have larger boiling point than O2 because of higher molecular weight.

6.False

In gaseous state disruptive forces are more than cohesive forces.

7.volatile liquid are those liquid which evaporates easily at room temperature eg: Gasoline

8.False

change of state from gas to solid is called deposition and the process is exothermic.

9.More the intermolecular forces it will tougher for a molecule to escape so higher temperature is required to boil.

so more intermolecular forces more boiling point.

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