Behavior of Gasses
Read p.70-71
• What makes gas particles different from solids
and liquids?
• There is lots of space between the particles
• What is the space that gas particles occupy
called?
• Volume
• What causes a change in the pressure of a gas?
• Temperature and pressure
Boyle’s Law
• Read the paragraph on Boyle’s Law on p.72
• Describe Boyle’s Law
• The volume of gas is inversely proportional to
its pressure.
• Pressure goes up, volume goes down.
• Volume goes up, the pressure goes down.
• The Ideal Gas Law
Charles’s Law
• Read p.72
• Describe Charles’s Law
• When the temperature increases, so does the
volume.
• If the temperature decreases, so does the
volume
• Charles's Law Experiment
Changes of State
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Skim through pages 74-79
List the 5 changes of state
Melting: solid to liquid
Freezing: liquid to solid
Evaporation: liquid to gas
Condensation: gas to liquid
Sublimation: solid to gas
Read p.74
• Define change of state.
• The change of a substance from one physical
form to another
• What must happen to change from one state
to another?
• You must add or remove energy
Read p.75
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What is melting?
The change of state from a solid to a liquid
What is a melting point?
It is the temperature in which a solid will melt
What type of property is a melting point?
Physical property
Continued
• What is the changing of state from a liquid to
a solid?
• Freezing
• What must be removed for something to
freeze?
• Energy
• What type of change is freezing?
• Exothermic
Read p.76
• What is evaporation?
• The change of a substance from a liquid to a
gas
• What is boiling?
• The change of a liquid to a vapor
• What is the temperature at which a liquid
boils?
• Boiling point
Read p.77
• As you increase in atmospheric pressure, the
temperature at which water boils ________.
• Decreases
• What is condensation?
• The temperature at which gas becomes a liquid
• What must happen for a gas to become a liquid?
• Particles must clump together
Read p.78
• What is sublimation?
• The change of state in which a solid changes
directly into a gas
• Why Is sublimation an endothermic change?
• Because energy is gained
Draw these
• Figure 1 p.74
• Figure 3 p.76