Ch. 8 - Solids, Liquids, &amp; Gases

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MATTER. Ch. 8 - Solids, Liquids, &amp; Gases. III. Behavior of Gases (p.228-231) Pressure Boyle’s Law Charles’ Law. A. Pressure. Which shoes create the most pressure?. A. Pressure. Key Units at Sea Level 101.325 kPa (kilopascal) 1 atm 760 mm Hg 14.7 psi. Atmospheric Pressure.

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MATTER

### Ch. 8 - Solids, Liquids, & Gases

III. Behavior of Gases (p.228-231)

Pressure

Boyle’s Law

Charles’ Law

A. Pressure

Which shoes create the most pressure?

A. Pressure
• Key Units at Sea Level

101.325 kPa (kilopascal)

1 atm

760 mm Hg

14.7 psi

Atmospheric Pressure

Contained Pressure

Manometer

Barometer

A. Pressure
A. Pressure
• Effect on Boiling Point
• When atmospheric pressure increases, the boiling point of a liquid increases.
• EX: high altitude cooking, boiling cold water

P

V

B. Boyle’s Law
• When the volume of a gas decreases, its pressure increases (at constant temp).

PV = k

INVERSE

V

T

C. Charles’ Law
• When the temperature of a gas increases, its volume also increases (at constant pressure).

DIRECT

C. Charles’ Law
• Absolute Zero - Temp at which...
• the volume of a gas would equal zero.
• all particle motion would stop.

-273°C

or

0 K