Gases and Vapor Pressure Concepts

These flashcards cover the key concepts regarding gases and vapor pressure, including definitions, relationships, and properties.

What is vapor pressure?

The pressure exerted by a vapor from a liquid at a given temperature.

How do substances with strong intermolecular forces (IMF) behave in terms of vapor pressure?

They have low vapor pressure, high boiling points, low rates of evaporation, and high heat of vaporization.

What happens to vapor pressure as temperature increases?

Vapor pressure increases as temperature increases.

What is the relationship between vapor pressure and atmospheric pressure at boiling point?

Boiling occurs when vapor pressure equals atmospheric pressure.

How does altitude affect boiling point?

At high altitudes, atmospheric pressure is lower, causing water to boil at a lower temperature.

Which liquid has the highest boiling point, strong or weak IMF?

The liquid with the strongest IMF has the highest boiling point.

What is the normal boiling point?

Normal boiling points are the temperatures that correspond to 101.3 kPa pressure.

What trend is evident between vapor pressure and temperature?

As temperature increases, vapor pressure also increases.

What type of relationship exists between pressure and temperature in gases?

It is a direct relationship; as pressure goes up, temperature goes up.

What is the vapor pressure of ethanol at 75˚C?

86 kPa.