Kinetic Molecular Model

Kinetic Molecular Model

Explains the properties of solids and liquids in terms of the following:

• Intermolecular forces of attraction

• Kinetic energy of the individual particles

Kinetic Energy

the ability to cause changes in matter

Kinetic Energy

it is dependent on the temperature of substance (rise in temperature increases the KE, making particles move more vigorously)

Relationship between kinetic energy and distance between particles

Directly Proportional

London dispersion forces

When two non-polar molecules approach each other, an instantaneous dipole moment forms

London dispersion forces

Weakest type of intermolecular force

Dipole-dipole Forces

only Polar molecules can experience this force

Dipole-dipole Forces

Ex: a slightly negative side of the water molecule is attracted to a slightly positive side of the water molecule

Hydrogen bonds

special type of dipole-dipole

Ion-Dipole Forces

Exists between an ion (charged particle) and a polar molecule

Ion-Dipole Forces

Positive side of the molecule is attracted to the negative ion and the negative side of the molecule is attracted to the positive ion