Vapor Pressure and Boiling

Front

What is vapor pressure?

Back

Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature.

Front

How does temperature affect vapor pressure?

Back

As temperature increases, vapor pressure increases because more molecules have enough energy to escape the liquid phase.

Front

What are intermolecular forces?

Back

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

Front

What is the relationship between intermolecular forces and boiling point?

Back

Stronger intermolecular forces result in a higher boiling point because more energy is required to break these forces.

Front

What is the normal boiling point of a substance?

Back

The normal boiling point is the temperature at which a liquid's vapor pressure equals the external pressure (usually 1 atm).

Front

What happens to vapor pressure when a liquid is heated?

Back

When a liquid is heated, its vapor pressure increases as more molecules gain sufficient energy to enter the vapor phase.

Front

What is the significance of hydrogen bonds in water?

Back

Hydrogen bonds in water lead to a lower vapor pressure and a higher boiling point compared to other similar-sized molecules.

Front

How does altitude affect boiling point?

Back

At higher altitudes, the atmospheric pressure decreases, which lowers the boiling point of liquids.

Front

What is volatility?

Back

Volatility is a measure of how readily a substance vaporizes; more volatile substances have higher vapor pressures.

Front

What is the effect of strong intermolecular forces on evaporation?

Back

Substances with strong intermolecular forces evaporate more slowly than those with weak forces.