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