Question 1

Which type of intermolecular force is primarily responsible for the high boiling point of water ($$\mathrm{H_2O}$$)?

Accepted Answer

Hydrogen bonding

Question 2

A student compares the melting points of $$\mathrm{CH_3OH}$$, $$\mathrm{C_6H_{12}}$$, and $$\mathrm{$$CuBr_2$$}. $$Which compound is expected to have the highest melting point, and why?

Accepted Answer

$$\mathrm{$$CuBr_2$$}$$, because it is an ionic compound

Question 3

Which of the following substances would have the highest vapor pressure at room temperature?

Accepted Answer

$$\mathrm{C_6H_{14}}$$

Question 4

If a liquid has strong intermolecular forces, what can you predict about its vapor pressure?

Accepted Answer

It will be low

Question 5

Which of the following molecules would most likely cause a liquid to have the lowest viscosity?

Accepted Answer

Small, nonpolar molecules

Question 6

Which of the following compounds should have the highest surface tension at a given temperature?

Accepted Answer

$$\mathrm{H_2O}$$

Question 7

Which of the following would have the lowest boiling point?

Accepted Answer

$$\mathrm{N_2$}$$

Question 8

A liquid with weak intermolecular forces will likely have which of the following properties?

Accepted Answer

High vapor pressure

Question 9

Which of the following statements best explains why ionic compounds generally have higher melting points than molecular compounds?

Accepted Answer

Ionic bonds are stronger than most intermolecular forces

Question 10

Which of the following molecules would you expect to have the lowest surface tension?

Accepted Answer

$$\mathrm{C_6H_{14}}$$

Question 11

A beaker contains two liquids: one with strong hydrogen bonding and one with only London dispersion forces. Which liquid will evaporate faster at room temperature?

Accepted Answer

The one with only London dispersion forces

Question 12

Which of the following is a direct relationship described in the study materials?

Accepted Answer

Stronger intermolecular forces lead to higher melting point

Question 13

Which property is measured to determine the strength of intermolecular forces in a liquid?

Accepted Answer

Surface tension

Question 14

Which of the following compounds would you expect to have the highest boiling point?

Accepted Answer

$$\mathrm{CH_3CH_2OH}$$

Question 15

Which of the following best describes the relationship between intermolecular forces and viscosity?

Accepted Answer

Stronger intermolecular forces result in higher viscosity

Question 16

A chemist observes that a liquid has a very high surface tension. What can be inferred about its intermolecular forces?

Accepted Answer

They are strong

Question 17

Which of the following molecules is most likely to exhibit hydrogen bonding?

Accepted Answer

$$\mathrm{CH_3OH}$$

Question 18

Which of the following statements is true regarding the relationship between intermolecular forces and boiling point?

Accepted Answer

Stronger intermolecular forces result in higher boiling points

Question 19

Which of the following substances would you expect to have the lowest vapor pressure?

Accepted Answer

$$\mathrm{H_2O}$$

Question 20

A liquid is found to have a low boiling point and high vapor pressure. What can you infer about its intermolecular forces?

Accepted Answer

They are weak

Intermolecular Forces and Physical Properties: Study Notes

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