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Properties of Gases >14.1 Compressibility

____________________ is a measure of

how much the _____________ of matter

____________ under _____________. When

a person collides with an inflated airbag, the

compression of the gas absorbs the energy of

the impact.

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Gases are easily compressed because of the

______________ between the particles in a gas.

• The distance between particles in a gas is much

__________ than the distance between particles in a

liquid or solid.

• Under pressure, the particles in a gas are forced

_____________ together.

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At room temperature, the distance between particles in an enclosed gas is about 10 times the diameter of a particle.


Properties of Gases >

Slide 4 of 21

14.1 Factors Affecting Gas Pressure

Factors Affecting Gas Pressure

What are the three factors that affect gas pressure?

•The _____________ of gas,

•_____________ of the container

and

•______________

are factors that affect gas pressure.

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Properties of Gases >14.1 Factors Affecting Gas Pressure

Four variables are generally used to describe a gas. The variables and their common units are

• _________ (P) in kilopascals

• _________ (V) in liters

• ____________ (T) in kelvins

• the number of ____________ (n).

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Amount of Gas

You can use kinetic theory to predict and explain how gases will respond to a change of conditions. If you inflate an air raft, for example, the pressure inside the raft will increase.

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______________ of particles with the inside

walls of the raft result in the _____________

that is exerted by the enclosed gas.

______________ the __________ of particles

increases the number of __________, which

is why the gas pressure increases.


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If the gas pressure increases until it exceeds the strength of an enclosed, rigid container, the container will burst.

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Volume

You can ___________ the pressure exerted

by a contained gas by ____________ its

volume. The more a gas is compressed, the

greater is the pressure that the gas exerts

inside the container.


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When the volume of the container is halved, the pressure the gas exerts is doubled.

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Temperature

An ______________ in the temperature of

an enclosed gas causes an ______________

in its pressure.

As a gas is heated, the average kinetic energy of the particles in the gas increases. Faster-moving particles strike the walls of their container with more energy.


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When the Kelvin _________________ of the

enclosed gas ______________, the

__________ of the enclosed gas

____________.

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