AP Chemistry 3.2

Front

What is the significance of point A in a phase change diagram?

Back

Point A represents the stage where energy is being used to increase the temperature of the solid.

Front

What does point B indicate in a phase change diagram?

Back

Point B indicates the stage where energy is being used to weaken the intermolecular forces between the molecules of the solid.

Front

Which type of intermolecular forces are present in calcium carbonate (chalk)?

Back

Calcium carbonate has ion-ion attractions.

Front

What type of intermolecular forces are found in motor oil?

Back

Motor oil primarily exhibits London dispersion forces.

Front

Why does calcium carbonate have a higher melting point than motor oil?

Back

Calcium carbonate has stronger ion-ion attractions compared to the weaker London dispersion forces in motor oil.

Front

What is the relationship between intermolecular forces and melting points?

Back

Substances with stronger intermolecular forces generally have higher melting points.

Front

How can you determine which substance has the strongest intermolecular forces from a graph?

Back

The substance with the highest melting point or boiling point on the graph typically has the strongest intermolecular forces.

Front

What are intermolecular forces?

Back

Intermolecular forces are the forces of attraction or repulsion between neighboring particles (atoms, molecules, or ions).

Front

What is the difference between ionic and covalent compounds in terms of intermolecular forces?

Back

Ionic compounds typically have stronger intermolecular forces (ion-ion attractions) compared to covalent compounds, which may have weaker forces like London dispersion or dipole-dipole interactions.

Front

What is the phase change from solid to liquid called?

Back

The phase change from solid to liquid is called melting.