chemistry 1010 atmosphere and balloons. boyles law p 1 v 1 = p 2 v 2
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Chemistry 1010
Atmosphere and Balloons
Boyles Law
P1V1 = P2V2
Charles’s Law
V1V2
T1 T2
=
Amonton’s Relationship
P1P2
T1 T2
=
Combined Gas Law
P1V1 P2V2
T1 T2
=
For Success, make surethat all units are the sameand that temperatures arein Kelvins
Book Problem
A gas occupies 3.8 L at 0.70 atm pressure. If we expand the volume at constant temperature to 6.5L, what is the final pressure?
A gas is expanded from an initial volume of 20.5 L at 0.92 atm at room temperature (298 K) to a final volume of 340.6 L. During the expansion the gas cools to 12.0 °C. What is the new pressure?
How Do Hot Air Balloons Work
How Do Hot Air Balloons Work
The air inside the balloon is heatedThe air molecules move faster They hit into each other with more forceThis force forces some molecules out of the balloonThis means there is less air inside the balloonBecause there is less air, the inside is less denseBecause it is less dense, the balloon will rise
Balloon History
Early Design of Balloon 1783
A Duck A Sheep A Rooster
First Gas Balloon
How Much Can a Balloon Lift
How Big Is A Balloon
Across the Atlantic
I Guess Pigs Really Do Fly
Balloons – Way Cool
OO O:
:..
......
ozone
troposphere
stratosphereozone
mesosphere
thermosphereKm
10
50
80
100
Atmosphere
surface
O2Short uv Light O
O3long uv light O2 O+
O O2O3+
CF2Cl2uv Light CF2Cl. Cl
Cl. O3ClO O2
O2
+ . +
ClO. O+ Cl. +
+
Ozone Hole By Year
Ozone Hole By Year
visable light
CH4
CO2
CFC's
EARTH
Temperature Change
CO2
25 billion tons produced on earth each yearEarth can absorb 15 billion tons10 billion ton excess each year
CH4
Has increased since 1977In less amount than CO2
20 – 30 times better at trapping heat
CFC’s
Smaller amount produced than othersHas increased since 1977
20,000 times better at trapping heat