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Slide 1
Slide 2
Needed this week Balloons One and two liter bottles Cotton
gloves (to handle and protect from dry ice?)
Slide 3
Chapter 13, States of Matter Four states of matter you need to
know: Solid Liquid Gas Plasma
Slide 4
Determining the states of matter The amount of kinetic energy a
substance contains determines its physical state (solid, gas,
liquid). The more energy it has, the looser it is bound
Slide 5
States of Matter
Slide 6
Adding Kinetic Energy
Slide 7
Notice Did you notice that the Kinetic energy was added in the
form of heat?
Slide 8
Solids Solids stick together and stay in the same position next
to each other (Like a class in which all students are seated)
Slide 9
Liquids In a liquid, the particles touch each other but can
move freely, like students in a crowded hallway.
Slide 10
Gases In a gas, the molecules are not in regular contact with
each other and bounce off when they hit one another (picture sixth
graders in gym)
Slide 11
Gas Pressure Gas pressure is the results of trillions of
molecules banging against each other. The pressure is exerted in
all directions at once. This is how a balloon or a tire stays
inflated.
Slide 12
Gas Pressure
Slide 13
Atmospheric pressure Atmospheric pressure is the pull of
gravity on all the gas above us in the atmosphere. A Barometer
measures this pressure At sea level, atmospheric pressure is 760 mm
of mercury, on Mt. Everest, it is 253 mm of mercury
Slide 14
Barometer
Slide 15
Measuring pressure Atmospheres (atm) mm of Mercury (mm Hg)
Pascals (Pa) Kilopascals (because pascals are tiny) (kPa)
Slide 16
Note = Dumb ole TV and radio meteorologists use inches of
mercury rather than mm or kPa!!! One inch is 25.4 mm 760 mm = 29.92
inches
Slide 17
Converting 1atm equals 760 mm Hg equals 101.3 kPa 1atm = 760 mm
Hg = 101.3 kPa
Slide 18
Swapping units 450 kPa X 760 mm Hg = 3400 mm Hg 101.3 kPa Note
that 760 mm Hg and 101.3 kPa are the same pressure, so you multiply
by one to convert
Slide 19
Standards STP = Standard Temperature and Pressure 273 K (0
Celsius) standard pressure is 1 atm At STP, one mole of gas
occupies 22.4 L
Slide 20
Temperature and Kinetic Energy Temperature is the Average
Kinetic Energy in a substance
Slide 21
Slide 22
Should you need more and better explanations:
http://phet.colorado.edu/en/simulation/st ates-of-matter (needs
java)(animation) http://phet.colorado.edu/en/simulation/st
ates-of-matter http://www.chemtutor.com/sta.htm (text)
http://www.chemtutor.com/sta.htm http://www.footprints-
science.co.uk/states.htm (animation and text)
http://www.footprints- science.co.uk/states.htm
http://www.youtube.com/watch?v=V9W YweBA6vA (music Video)
http://www.youtube.com/watch?v=V9W YweBA6vA
Slide 23
More links http://www.youtube.com/watch?v=cBB mdqti_Kg (student
project video) http://www.youtube.com/watch?v=cBB mdqti_Kg
http://www.youtube.com/watch?v=vDZh Ukp30tE (teacher done music
video) http://www.youtube.com/watch?v=vDZh Ukp30tE
Slide 24
Conclusions Answers questions 3-5 on page 389. Click the sounds
icon for my answers