Question 1

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

Accepted Answer

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

Question 2

Which type of intermolecular force is present in all molecules, regardless of their composition?

Accepted Answer

London dispersion forces

Question 3

What is the dominant intermolecular force between magnesium sulfate (Epsom salts) and water in a bath?

Accepted Answer

Ion-dipole forces

Question 4

Which of the following molecules is expected to have the largest London dispersion forces?

Accepted Answer

C12H26

Question 5

Which intermolecular force is responsible for the high boiling point of water compared to other similar-sized molecules?

Accepted Answer

Hydrogen bonding

Question 6

A liquid with strong intermolecular forces will generally have which of the following properties?

Accepted Answer

High surface tension

Question 7

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

Accepted Answer

CaS in H2O

Question 8

Choose the substance with the highest vapor pressure at a given temperature.

Accepted Answer

Kr

Question 9

Which of the following will have the lowest boiling point?

Accepted Answer

C6H14

Question 10

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

Accepted Answer

Small, nonpolar molecules

Question 11

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

Accepted Answer

CI4

Question 12

What is the major electrostatic force found within an ammonia molecule, NH3?

Accepted Answer

Covalent bond

Question 13

As it cools off, olive oil slowly hardens and forms a solid over a range of temperatures. Which best describes it as a solid?

Accepted Answer

Amorphous

Question 14

Compound A is hard, doesn’t conduct electricity, and melts at 1400ºC. Compound A represents which of the following:

Accepted Answer

Covalent Network solid

Question 15

Which equation would you use to calculate the energy required to heat a substance from one temperature to another without a phase change?

Accepted Answer

$$q = m \cdot C \cdot \Delta T$$

Question 16

A 53.2 kJ of heat is added to a 15.5 g ice cube at -5.00°C. Given the specific heat of ice is $$2.09 \ J/(g \cdot ^\circ C)$$ and $$\Delta H_{fusion} = 334 \ J/g$$, what is the final state of the substance?

Accepted Answer

The ice melts and becomes liquid water

Question 17

Which of the following best describes a crystalline solid?

Accepted Answer

Atoms, ions, and molecules have a highly ordered arrangement throughout

Question 18

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

Accepted Answer

AlF3

Question 19

Which equation represents the heat required for a phase change from solid to liquid?

Accepted Answer

$$q = m \cdot \Delta H_{fusion}$$

Question 20

Which physical property is directly related to the strength of intermolecular forces?

Accepted Answer

Boiling point

Liquids, Solids, and Intermolecular Forces: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard