The Ideal Gas Law
Objective: to calculate variables affecting ONE gas using the ideal gas law
The behavior of gases depends on:
temperature, pressure, moles, volume
WHEN??
ONE GAS
NOT STP
Pv=nRT
P= pressure in atm
v= volume in liters
n= moles
T= temperature in Kelvin
Use the definition of molar volume to solve
for R
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When filling a weather balloon with gas you have to consider that the gas will expand greatly as it rises and the
pressure decreases. Let’s say you put about 10.0 moles of He gas into a balloon that can inflate to hold 5000.0L.
Currently, the balloon is not full because of the high pressure on the ground. What is the pressure when the
balloon rises to a point where the temperature is -10.0°C and the balloon has completely filled with the gas.
At 34.0°C the pressure inside a nitrogen filled tennis ball with a volume of 148 ml is 212kPa. How many grams of
nitrogen are in the tennis ball?
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A volatile liquid is placed in a flask whose volume is 590.0 mL and allowed to boil until only the vapor fills the
flask at a temperature of 100.0°C and 736 mm Hg pressure. If the mass of the volatile liquid is 1.10 grams.
Calculate the formula weight of the gas.
Minute Paper: Calculate the mass of the air in a hot-air balloon that has a volume of 4.00 x 105 liters when
the temperature is 30ºC and the pressure is 748 mmHg. The molar mass of air is 29.0 grams/mole.
How do I get from where I am to where I’m going?
10 Minute Makeover Customize your learning by choosing from the following options each night:
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Complete the Limiting Reactant section on the Portfolio Page
Review the PPT file on the website
QUIA flashcard practice (http://www.quia.com/jg/1339920.html)
Read pages 2341-343 in the book
Extra practice problems: page 343 #25-answer in Appendix C
Check out the tutorial sources in the LiveBinder
Complete the SYS Assignment
Review the skills from today’s Train Your Brain
T. O’Toole