What type of intermolecular force would you expect to dominate in the following

Question

What type of intermolecular force would you expect to dominate in the following (give the name of the predominant force) How would this affect boiling point (rate them middle, lowest)?_____The volatility of a substance does not depend on the intermolecular forces the substance.____The weaker the intermolecular forces, the more likely it is that molecules are to evaporate at a given temperature, making the liquid more volatile.____The stronger the intermolecular forces, the more likely it is that molecules are to evaporate at a given temperature, making the liquid more volatile.____The energy needed to melt a solid is called the enthalpy of sublimation.____A colligative property depends on the number of particles of solute in solution

Explanation / Answer

6.

                              Intermolecular forces                      boiling point

    CH3OH        hydrogen bonding                                  Highest

    CH3Cl          dipole -dipole interaction                        Middle

    CH4              Van der Waal's dispersion forces           Lowest

According to the strength of the intermolecular forces, the boiling point changes. Higher the intermolecular force, higher the energy required to break those bonds and higher the boiling point. Hence, hydrogen bonding>dipole-dipole>van der waal's dispersion force being the trend of those forces, the boiling points vary as shown above.

7.a. False

b. True

c. False

d. False

e. True

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