Transcript The Gas Laws - Teresa Hodge's Electronic Portfolio

The Gas Laws
Don’t be pressured
Teresa A. Hodge June 10,2012
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Introduction
This PowerPoint will cover the three basic Gas Laws:
Charles, Boyles, and Gay-Lussac, . It will cover definition
and applications as well as demonstrate the cause and
effect of different variable. Each law will have a graphic
representation and a slide which explains the mathematical
derivation of the law. This presentation will also give a brief
overview of the characteristics of gas and the variable
which effect it.
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Indefinite shape and volume
Particles are very far apart
Particles are moving fast
The motion is random
The collisions are elastic
The particles are compressible
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Temperature
Pressure
Volume
Amount of Gas
A Constant is any variable that does not
change.
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 In this law the Pressure remains constant
 The two remaining variable, Temperature and
Volume are related proportionally
 This means as one increases, the other variable
also increases.
 This creates a graph with a positive slope(View
here)
Learn to calculate the volume and temperature of a gas using
Charles Law click HERE
For additional information click HERE
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V = cT Where V= Volume T=Temperature c= a constant
For every gas at a particular pressure the constant does not
change which means:
V1 = cT1
get:
𝑉1
𝑇1
=𝑐
and V2 = cT2 , when we solve for the constant c you
𝑉2
and
𝑇2
=𝑐
, since they both equal c then you can
𝑉1
𝑉2
combine the equations and get:
=
,
𝑇1
𝑇2
which is the mathematical representation of Charles Law
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 In this law the Temperature remains constant
 The two remaining variable, Pressure and
Volume are related inversely
 This means as one increases, the other variable
decreases.
 This creates a graph with a negative slope(View
here)
Learn to calculate the volume and temperature of a gas using
Boyles Law click HERE
For additional information click HERE
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1
𝑃= 𝑐,
Where P= Pressure V= Volume c = constant
𝑉
For every gas at a particular temperature the constant does not
change which means:
𝑃1 =
1
𝑐
𝑉1
,
and
𝑃2 =
1
𝑐 then solving for the constant you get:
𝑉2
P1V1 = c and P2V2 = c, since they both equal c you can combine them
to get: P1V1 = P2V2
which is the mathematical representation of Charles Law
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 In this law the Volume remains constant
 The two remaining variable, Temperature and
Pressure are related proportionally
 This means as one increases, the other variable
also increases
 This creates a graph with a positive slope(View
here)
Learn to calculate the volume and temperature of a gas using
Gay-Lussac’s Law click HERE
For additional information click HERE
Exit
Exit
P = cT Where P= Pressure T=Temperature c= a constant
For every gas at a particular volume the constant does not
change which means:
P1 = cT1
get:
𝑃1
𝑇1
=𝑐
and P2 = cT2 , when we solve for the constant c you
𝑃2
and
𝑇2
=𝑐
, since they both equal c then you can
𝑃1
𝑃2
combine the equations and get:
=
,
𝑇1
𝑇2
which is the mathematical representation of Gay-Lussac’s Law
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Virtual Lab:
Directions: Click on the link which will take you to
a virtual lab site. Click the button which says run now.
Once the lab begins you can adjust two out of the three
variables and observe what happens to the gas in the
system. CLICK HERE.
Gas Law Trivia:
Directions: Follow the link and answer the
questions. CLICK HERE
Gas Law Movies:
Directions: Follow the link and choose one of
several movies about the gas laws. CLICK HERE
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http://phet.colorado.edu/en/simulation/gas-properties
http://www.funtrivia.com/playquiz/quiz2287571a312e0.html
http://www.kentchemistry.com/moviesfiles/Units/GasLawsMovi
es.htm
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