AP Chemistry Unit 3.1-3.6 Review

Front

What type of solid typically has the lowest melting point of the four types of crystals?

Back

Molecular solids typically have the lowest melting point.

Front

Which gases would have the most nearly identical rates of effusion at 333 K?

Back

CO and N2 would have nearly identical rates of effusion.

Front

What explains the difference in melting points between Cl2 (-101.5) and F2 (-219)?

Back

The increased mass (polarizability) of chlorine explains the difference in melting points.

Front

What intermolecular forces exist in PCl3?

Back

PCl3 has London dispersion forces and dipole-dipole interactions.

Front

What happens to pressure when the volume of air in a syringe decreases?

Back

Pressure increases due to the smaller volume and more collisions with the sides of the syringe.

Front

Define molecular solids and give an example.

Back

Molecular solids are composed of molecules held together by intermolecular forces. An example is ice (solid H2O).

Front

What is effusion in the context of gases?

Back

Effusion is the process by which gas molecules escape through a tiny hole into a vacuum.

Front

Explain the concept of polarizability and its effect on melting points.

Back

Polarizability refers to the ability of a molecule's electron cloud to be distorted. Higher polarizability generally leads to higher melting points due to stronger London dispersion forces.

Front

List the four types of crystalline solids.

Back

The four types of crystalline solids are ionic, covalent network, metallic, and molecular.

Front

What is the relationship between volume and pressure in a gas according to Boyle's Law?

Back

Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature.