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Boiling Point and Vapor Pressure Quiz

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Questions and Answers

What happens to the vapor pressure of a liquid as its temperature increases?

It increases. (correct)
It remains constant.
It decreases.
It fluctuates randomly.

A liquid starts to boil when its vapor pressure...

is independent of the external pressure.
is greater than the external pressure.
is less than the external pressure.
is equal to the external pressure. (correct)

What is the definition of the normal boiling point of a liquid?

The temperature at which a liquid boils at 0°C.
The temperature at which a liquid boils under any pressure.
The temperature at which a liquid boils at 1 atm pressure. (correct)
The temperature at which a liquid freezes at 1 atm pressure.

Water boils at a temperature greater than 100°C when the pressure is...

<p>greater than 1 atm. (C)</p> Signup and view all the answers

What happens to the boiling point of a liquid at lower pressures?

<p>The boiling point decreases. (D)</p> Signup and view all the answers

Flashcards

Boiling Point

The temperature at which a liquid's vapor pressure equals external pressure.

Normal Boiling Point

The temperature at which a liquid boils at exactly 1 atm pressure; for water, it is 100°C.

Vapor Pressure

The pressure exerted by vapor in equilibrium with its liquid at a given temperature.

Effect of Pressure on Boiling Point

Higher pressure increases boiling point; lower pressure decreases it.

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Kinetic Energy and Boiling

Molecules need greater kinetic energy to escape the liquid as temperature increases.

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Study Notes

Boiling Point and Vapor Pressure

Liquid vapor pressure increases with temperature rise.
Boiling occurs when vapor pressure equals external pressure (atmospheric pressure for open containers).
Vapor bubbles form throughout the liquid.
Normal boiling point is the boiling temperature at 1 atm pressure.
Water's normal boiling point is 100°C.
Boiling point depends on pressure.
Higher pressure leads to a higher boiling point for water (above 100°C), as greater kinetic energy is required for vaporization to overcome the increased pressure.
Lower pressure leads to a lower boiling point for water (below 100°C).

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Description

Test your knowledge on boiling points and vapor pressure with this quiz. Discover how temperature and pressure influence vaporization and understand key concepts related to boiling points of liquids, especially water. Challenge yourself with questions about the normal boiling point and its dependence on external pressure.