LAB---FINDING THE NUMBER OF MOLES OF AIR IN YOUR
CLASSROOM USING IDEAL GAS LAW
PURPOSE: To use the ideal gas equation in order to find out how many moles
of air are in your classroom
MATERIALS: calculator, meter stick, metric tape measure, thermometer,
barometer
PROCEDURE:
1.
(YOU MUST SHOW ALL WORK INVOLVED)
Measure the atmospheric pressure using the barometer in INCHES OF
Hg. Convert this pressure to cm Hg, mm Hg, and atm. Record all of
these.
2. Find the air temperature using the thermometer in degrees Celsius.
Convert this to Kelvin and record both temperatures.
3. Find the length, width, and height of the classroom in meters. Record all
3 measurements.
4. Calculate the volume of the room in cubic meters, cubic cm, mL, and
liters. Record all volumes.
DATA TABLE AND CALCULATIONS:
Remember to show all work for calculations and round answers to the
appropriate sig figs.
PRESSURE= __________inches Hg
=___________cm Hg
= __________mm Hg
= __________atm
**1 inch = 2.54 cm
** 760 mm Hg = 1 atm
TEMPERATURE= ________________C = ________________K
LENGTH OF ROOM = ____________________meters
WIDTH OF ROOM = ______________________meters
HEIGHT OF ROOM = _____________________meters
VOLUME OF ROOM = ___________________________cubic meters
= _______________________cubic centimeters
= _____________________________________mL
= ______________________________L
CONCLUSIONS:
1.
Using the ideal gas equation and your data, calculate the number of
moles of air in your classroom. SHOW YOUR WORK TO RECEIVE
CREDIT.
2. Find the mass of air in your classroom if the approximate molar mass of
air is 29.0 grams/mole. SHOW WORK TO RECEIVE CREDIT.