Question 1

Which of the following best describes the difference between intramolecular and intermolecular forces?

Accepted Answer

Intramolecular forces exist within a molecule and influence chemical properties, while intermolecular forces exist between molecules and influence physical properties.

Question 2

Which of the following intermolecular forces is present in all substances, regardless of their polarity?

Accepted Answer

London dispersion forces

Question 3

A student adds magnesium sulfate (Epsom salts) to bath water. What is the primary intermolecular force between magnesium sulfate and water?

Accepted Answer

Ion-dipole forces

Question 4

Which of the following molecules would have the largest London dispersion forces?

Accepted Answer

C12H26

Question 5

Which of the following compounds would have the highest melting point?

Accepted Answer

CaS in H2O

Question 6

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

Accepted Answer

Kr

Question 7

Which of the following will have the lowest boiling point?

Accepted Answer

C6H14

Question 8

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

Accepted Answer

Small, nonpolar molecules

Question 9

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

Accepted Answer

CI4

Question 10

Which of the following best describes an amorphous solid?

Accepted Answer

Particles are randomly arranged with no discernible pattern.

Question 11

Compound A is hard, does not conduct electricity, and melts at 1400$$^\circC. $$Which type of solid is it?

Accepted Answer

Covalent network solid

Question 12

Which of the following is an example of an ionic solid?

Accepted Answer

AlF$$_3$$

Question 13

What is the major electrostatic force found within an ammonia molecule, NH$$_3$$?

Accepted Answer

Covalent bond

Question 14

A 15.5 g ice cube at $$-5.00^\circC $$absorbs 53.2 kJ of heat. Given the specific heat of ice is $$2.09 \ \frac{J}{g \cdot ^\circ C}$$ and $$\Delta H_{fusion} = 334 \ \frac{J}{g}$$, what will be the resulting state and temperature of the substance?

Accepted Answer

All the ice will melt and the water will be at a temperature above $$0^\circC.$$

Question 15

Which of the following best explains why oil does not evaporate quickly at room temperature?

Accepted Answer

Oil has strong intermolecular forces.

Question 16

Which of the following is the dominant intermolecular force between KCl and CH$$_3OH$$?

Accepted Answer

Ion-dipole forces

Question 17

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

Accepted Answer

The stronger the intermolecular forces, the higher the boiling point.

Question 18

Which of the following best describes the process occurring at the boiling point of a liquid?

Accepted Answer

The temperature where the vapor pressure of the liquid equals the external pressure.

Question 19

Which of the following is a property of crystalline solids?

Accepted Answer

Atoms, ions, or molecules are arranged in a highly ordered pattern.

Question 20

A heating curve for water shows a plateau at $$100^\circC. $$What is happening to the water during this plateau?

Accepted Answer

The water is undergoing a phase change from liquid to gas.

Liquids, Solids, and Intermolecular Forces: Study Guide

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