Q3W1 KINETIC MOLECULAR MODEL

Match

Match the ΔEN and the type of bond.

• < 0.5

• 0.5 to 1.9

• > 1.9

Nonpolar covalent

Polar covalent

Ionic

• Nonpolar covalent

• Polar covalent

• Ionic

Categorize

Options (12)

N₂

Br

Li

HF

H₂O

NH₃

CH₃COOH

CH₃OH

CH₃NH₂

I₂

O₂

F₂

Categorize the following molecules as polar or non-polar.

Polar

Non-polar

Categorize

Options (15)

has dipole

partially positive and negative

CH₄

assymetrical geometry

symmetrical geometry

HF

O₂

Helium

central atom has lone pairs

central atom has no lone pairs

Cl

Electronegativity difference is >0.5

Electronegativity difference is <0.5

unequal sharing of electrons

equal sharing of electrons

Organize these options into the right categories. Electronegativity difference is <0.5

Polar

Non-polar

Multiple Choice

What form of energy does an object possesses due to its motion?

• Chemical energy

• Electrical energy

• Kinetic energy

• Potential energy

Multiple Choice

Particle can be atom, molecule or ions.

• True

• False

Multiple Choice

Particles move in random curve motion.

• True

• False

Multiple Choice

Gas molecules exert attractive or repulsive forces on each other or the container walls

• True

• False

Multiple Choice

Collisions between gas particles or collisions with the walls of the container involve loss of energy.

• True

• False

Multiple Choice

None of the energy of a gas particle is lost when it collides with another particle or with the walls of the container.

• True

• False

Multiple Choice

The average kinetic energy of a collection of gas particles depends on the temperature of the gas and nothing else.

• True

• False

Multiple Choice

There is no force of attraction between gas particles or between the particles and the walls of the container.

• True

• False

Match

Match the following IMF.

• present in all condensed phases (solid & liquid)

• approach of an ion induces a dipole

• a polar molecule induces a dipole

• between polar molecules

• between an ion and a polar molecule

London Dispersion Force

Ion-induced dipole

Dipole-induced dipole

Dipole-dipole

Ion-dipole

• London Dispersion Force

• Ion-induced dipole

• Dipole-induced dipole

• Dipole-dipole

• Ion-dipole

Reorder

Re-order the following intermolecular forces from strongest (1) to weakest (5).

• Ion-dipole

• Hydrogen bonding

• Dipole-dipole

• Dipole-induced dipole

• London-dispersion forces

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Select

Select all applicable IMF involved.

• Ion-dipole

• London dispersion

• Dipole-dipole

• Hydrogen bond

Multiple Select

Select all applicable IMF involved.

• Ion-dipole

• London dispersion

• Dipole-dipole

• Hydrogen bond

Multiple Select

Select all applicable IMF involved.

• Ion-dipole

• London dispersion

• Dipole-dipole

• Hydrogen bond

Multiple Select

Select all applicable IMF involved.

• Ion-dipole

• London dispersion

• Dipole-dipole

• Hydrogen bond

Multiple Choice

Which of the following has the strongest IMFA?

• HCl

• N₂

• NH₃

• NaCl

Multiple Choice

Which of the following has the weakest IMFA?

• HCl

• N₂

• NH₃

• NaCl

Multiple Choice

Which of the following defines surface tension?

• The measure of a fluid’s resistance to flow.

• The measure of the elastic force in the surface of a liquid.

• The temperature at which the vapor pressure of a liquid is equal to the external pressure.

• The pressure exerted by the gas in equilibrium with a liquid in a closed container at a given temperature.

Multiple Choice

How will you characterize the viscosity of a liquid with a strong IMFA?

• Average

• High

• Low

• None

Multiple Choice

How will you characterize the viscosity of a liquid with a weak IMFA?

• Average

• High

• Low

• None

Multiple Choice

Which of the following defines vapor pressure?

• The measure of a fluid’s resistance to flow.

• The measure of the elastic force in the surface of a liquid.

• The temperature at which the vapor pressure of a liquid is equal to the external pressure.

• The pressure exerted by the gas in equilibrium with a liquid in a closed container at a given temperature.

Multiple Choice

Why does oil have a higher boiling point (>200°C) than water (100°C) even though it is non-polar?

• It has ionic bonding.

• It has more atoms involved than water.

• It has a relatively large size of molecules compared to water.

• All of the above.

Multiple Choice

Which of the following is an amorphous solid?

• Salt

• Iron

• Glass

• Sugar

Multiple Choice

The following are examples of amorphous solids EXCEPT

• Rubber

• Iron

• Glass

• Cotton candy