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Behavior of Gases

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Behavior of Gases. Bill Howard Hopkinton Middle School ... Nitrogen gas dissolved in the blood expands when a diver surfaces too quickly. ... – PowerPoint PPT presentation

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Title: Behavior of Gases


1
Behavior of Gases
Bill Howard Hopkinton Middle School
2
We must consider these three properties when
predicting gas behavior
  • volume
  • temperature
  • pressure

3
the amount of space that matter fills
Volume
4
the measure of the average energy of motion
(T.E.) of the particles of a substance
Temperature
Not all of the particles have the same energy of
motion
5
The force pushing on the surface divided by the
area of that surface
Pressure
force area
Pressure
6
Gas molecules collide with each other and the
sides of the container
Units of pressure kilopascals (kPa)
atmospheres (atm)
pounds per
square inch (psi)
7
Click on this link and select Boyles Law to read
pressure overview and view pressure animation
http//oldmanhonda.com/FlashTutorials/GasLaws.html

X out of web site to return to PowerPoint Dont
hit the back button
8
Boyle's law
The relationship between PRESSURE and VOLUME
At a constant temperature, when the volume
increases, pressure decreases.
pressure
volume
volume
pressure
9
Boyles law graph
the pressure decreases
Volume and pressure are inversely proportional
As the volume increases
10
As the volume decreases
the pressure increases
Temperature is constant
11
Click this link for interactive Boyles law
animation
http//www.chem.iastate.edu/group/Greenbowe/sectio
ns/projectfolder/flashfiles/gaslaw/boyles_law.html

12
Who cares? Boyles law in the real world
open bottle
pressure
CO2 volume
fizz
13
Who cares? Boyles law in the real world
High pressure allows storage of large amounts of
propane
14
Who cares? Boyles law in the real world
15
High Altitude Balloons
Sea level
High altitude
lower atmospheric pressure
higher atmospheric pressure
16
The Bends Decompression Sickness
Nitrogen gas dissolved in the blood expands when
a diver surfaces too quickly.
Analogy What happens to the dissolved CO2 when
you open a Coke?
Click this link to view Navys slide show
http//www.onr.navy.mil/focus/blowballast/animatio
n/sub/boyleslaw.swf
17
Charles's law
The relationship between TEMPERATURE and VOLUME
At a constant pressure, when the temperature
increases volume increases.
temperature
volume
volume
temperature
18
the volume increases
Volume and pressure are directly proportional
As the temperature increases
19
the volume increases.
Pressure is constant
As the temperature increases
20
Click this link for interactive Charless law
animation
http//www.chem.iastate.edu/group/Greenbowe/sectio
ns/projectfolder/flashfiles/gaslaw/charles_law.htm
l
21
Who cares? Charless law in the real world
One must consider possible temperature changes
when filling a float balloon with helium
What might happen if the air temperature rises
too much?
22
Guy-Lussac's law
The relationship between TEMPERATURE and PRESSURE
At a constant volume, when the temperature
increases pressure increases.
temperature
pressure
pressure
temperature
23
temperature and pressure are directly proportional
the pressure increases.
pressure
temperature
As the temperature increases
24
Who cares? Guy-Lucssacs law in the real world
What might happen if a defective propane tank
gets too hot?
25
Who cares? Guy-Lucssacs law in the real world
Proper tire inflation is important!
friction
temperature
YIKES!
pressure
26
Gas Laws Recap
Boyle's law
VOLUME
PRESSURE
Charles's law
VOLUME
TEMPERATURE
Guy-Lussac's law
TEMPERATURE
PRESSURE
27
Work Cited
http//www.indiana.edu/geog109/topics/10_ForcesW
inds/GasPressWeb/PressGasLaws.htm l
http//oldmanhonda.com/FlashTutorials/GasLaws.html
http//www.gypsyjournal.net/tire20blowout202.jpg

http//www.grc.nasa.gov/WWW/K-12/airplane/aboyle.h
tml
http//chemsite.lsrhs.net/g_gasses/images/Boyles_l
aw_graph.gif
http//wps.prenhall.com/wps/media/objects/476/4883
16/Instructor_Resources/Chapter_11/FG11_11.JPG
http//images.usatoday.com/tech/_photos/wonderques
t/2004/02-06-balloon.jpg
http//liftoff.msfc.nasa.gov/shared/news2003/Mars/
marsflyer3.jpg
http//wine1.sb.fsu.edu/chm1045/notes/Gases/Pressu
re/Gases02.htm
http//www.scuba-doc.com/art-mos3036a.fig1.jpg
http//www.onr.navy.mil/focus/blowballast/animatio
n/sub/boyleslaw.swf
http//www.chem.iastate.edu/group/Greenbowe/sectio
ns/projectfolder/flashfiles/gaslaw/boyles_law.htm
l
http//www.momathome.com/viewfromhome/images/tgivi
ng_spongebob.jpg
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