Liquids and Intermolecular Forces

Water has an unusually high boiling point for a molecular compound because it has

• hydrogen bonding

• ion-dipole interactions

• ion-ion attractions

• London dispersion forces

Which substance has the weakest intermolecular forces?

• Substance A, boiling point of 75 °C

• Substance B, boiling point of 105 °C

• Substance C, boiling point of 25 °C

• Substance d, boiling point of 45 °C

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

Melting and boiling points depend on thermal energy and the strength of ________

• intramolecular forces

• polar covalent bonds

• metallic bonds

• intermolecular forces

Water and ammonia molecules are roughly the same size and the same mass but ammonia boils at -28°F and water boils at 212°F. What can we conclude about the intermolecular forces between water and ammonia?

• The intermolecular forces are the same strength

• Ammonia has stronger intermolecular forces

• Water has stronger intermolecular forces

• Not enough information is given

This refers to the surface film on the surface of the liquid caused by the attraction of particles.

• Specific heat

• Surface tension

• Density

• Volatility

Higher IMF means _________ Viscosity.

A substance with a high vapor pressure have _______ intermolecular forces?

• weak

• strong

As the temperature of a liquid increases, the viscosity

• Increases

• Doesn't change

• Not enough information

• Decreases

These are forces between liquid molecules and another substance.

• adhesive forces

• cohesive forces

• coercive forces

• adversive forces