Lesson 1: Kinetic Molecular Theory

Question 1

What is Kinetic Molecular Theory?

Answer 1

It provides an overview of the microscopic properties of molecules of atoms and their interaction.

Question 2

What are the 4 statements by KMT?

Answer 2

1. Matter is composed of small particles.
   (Atoms are a building blocks of matter; Matter can also exist as molecules)
2. The molecules interact with another through attractive forces.
   (Intermolecular Forces is the attractive forces between molecules; the stronger the interaction, the smaller their distance will be)
3. These molecules are always in constant random motion.
   (Depending on temperature and strength of the interaction between particles)
4. The temperature of a substance is a measure of the average kinetic energy of the molecule.
   (As heat increases, kinetic energy increases)

Question 3

• restricted motion due to their strong intermolecular forces
• particles vibrate
• High density

Answer 3

Solids

Question 4

• intermediate intermolecular forces
• move past each other
• restricted to small distances
• High density

Answer 4

Liquids

Question 5

• weak intermolecular forces
• move in relatively long distances before collision
• Low density

Answer 5

Gases

Question 6

As heat increases, kinetic energy ______

Answer 6

increases

Question 7

At what temperature does intermolecular forces determine the state of a substance?

Answer 7

Low temperature

Question 8

The physical state of matter is affected by both _____ and _____

Answer 8

kinetic energy and intermolecular forces

Question 9

At higher temperature, the molecules have higher kinetic energy, and will be able to _______ the intermolecular forces present.

Answer 9

overcome

Question 10

What are the two types of attractive forces?

Answer 10

1. Intramolecular forces
2. Intermolecular forces

Question 11

• within
• holds particles together in metallic, ionic, and covalent bonds
• bonds formed withun the atom

Answer 11

Intramolecular forces

Question 12

• between
• attractive forces between molecules
• explains the property of a molecule

Answer 12

Intermolecular forces

Question 13

What are the four types of it intermolecular forces?

Answer 13

1. Dipole-Dipole Forces (Van der waals)
2. Ion-Dipole Forces
3. London Dispersion Forces
4. Hydrogen Bonds

Question 14

pair of two opposite charge

Answer 14

Dipole

Question 15

• exist between polar molecules
• the larger the dipole moment, the _____ the force

Answer 15

Dipole-Dipole Forces
______ - greater the force

Question 16

• results from interaction between an ion and a polar molecule
• the higher the charge of ion the ______ magnitude of the dipole

Answer 16

Ion-Dipole Forces
_____ - higher magnitude of the dipole

Question 17

what do you call the interaction between ion and polar molecules?

Answer 17

Electrostatic attraction

Question 18

• weakest intermolecular force
• present between all types of molecules due to the movement of electrons
• only forces acting in non polar molecules

Answer 18

London Dispersion Forces

Question 19

• strongest intermolecular force
• special type of dipole-dipole interaction in molecules
• hydrogen atom is bonded to a highly electronegative atom

Answer 19

Hydrogen Bond