Intermolecular forces and KMT

Intermolecular forces and KMT - Section 1

Poll

Where are you on the scale?

• 1

• 2

• 3

• 4

Multiple Choice

________________________ have the strongest intermolecular forces of attraction.

• Dipole- Dipole

• Dispersion

• Hydrogen Bonds

Multiple Choice

Which is the second strongest intermolecular force, after hydrogen bonding?

• dipole-dipole attraction
• London forces

Common Substances with each type of force

• Hydrogen Bonding - NH₃, HF, H₂O

• Dipole - Dipole - HCl, H₂S, OF₂

• London Dispersion forces - I₂, F₂, CH₄, Cl₂

Why does the IMF strength matter?

The stronger attraction between the molecules, the harder it is to separate them meaning higher viscosity, surface tension, and boiling point.

Multiple Choice

The weaker the intermolecular forces of a substance the _____________ the boiling point

• higher

• lower

Multiple Choice

Which of these has dispersion forces?

• I₂

• NH₃

• OCl₂

• SH₂

Multiple Choice

Which substance would have the highest boiling point at standard pressure?

• H₂O

• CCl₄

• CO₂

• NBr₃

Multiple Choice

Which substance would have the weakest intermolecular forces of attraction?

• CH₄

• NaCl

• H₂O

• MgF₂

Multiple Choice

Which type of motion in the figure best represents the movement of gas particles?

• Motion 1

• Motion 2

• Motion 3

• Motion 4

Multiple Choice

_______ is an explanation of how particles in matter behave

• Boyle's Law

• Charles' Law

• Kinetic Molecular Theory

Multiple Choice

Which gas deviates the most from ideal behavior?

• CH₄

• H₂O

• Cl₂

• He

Multiple Choice

Which of the following is an assumption of the kinetic-molecular theory of gases?

• Collisions between gas particles are inelastic.

• Gases consist of closely spaced particles.

• Gas particles move around in an orderly manner.

• The temperature of a gas depends on the average kinetic energy of the gas particles.

Multiple Choice

A hypothetical gas that perfectly fits all the assumptions of the kinetic molecular theory is known as

• real gas

• ideal gas

• imaginary gas

• perfect gas

Multiple Choice

• Gas particles are elastic and do not attract each other.
• The kinetic energy of gas is dependent on temperature 
• Energy is not lost when gas particles collide with each other or with the walls of the container.
• All of the above

Multiple Choice

Gas pressure is caused by

• gas molecules colliding with surfaces
• gas molecules condensing to a liquid
• gas molecules hitting other gas molecule
• barometers

Multiple Choice

Which one of these is NOT an Ideal Gas Assumption?

• Gas particles are hard, round spheres.

• Gas particles are strongly attracted to one another.

• Gas particles do not take up space.

• Gas particles collide perfectly elastically.

Multiple Choice

Collisions in which particles transfer all their kinetic energy to other particles are called ___.

• elastic

• inelastic

Multiple Choice

The more energy that particles have, the ___ they move.

• slower

• faster