I use this lab to introduce gas laws to first year students. They fill out a ws by using the site to see the relationships between volume and temperature, pressure and moles of gases.
WS is below
WS1 Honors, Take Home Lab: Virtually Gas Laws
1. What is Kinetic Molecular Theory?
2. What affects the movement of particles?
Go to http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm .
The moving particles represent 1 mole of gas molecules.
a. What other factors are given to you?
b. increase the temperature by about 50, what happens to the molecules?
c. decrease the temperature by about 50, what happens to the molecules?
d. Temperature is a measure of kinetic energy, explain this statement based on your observations.
Temperature is measured on the Kelvin scale. K = C + 273.15
3. What is pressure?
Go to http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm . The moving particles represent 1 mole of gas molecules. Notice that the molecules are colliding with each other and with the sides of the container, these collisions represent the forces/unit area.
What would you look for if pressure increased?
If there were no moles of gas, there would be no pressure, this is a called a vacuum.
a. What units of measurement and how are these units related?
b. What is a barometer? c. What does it measure?
Manometers measure the difference between gas pressures. See WS 2
Go to http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm. Click on pressure. Notice the temperature is constant. Note the value of pressure and volume.
d. Change the volume, what happens to the pressure?
Click on volume, change the pressure, what happens to the volume.
Record several values to look at.
Volume Pressure
How is volume and pressure related when moles and temperature are constant?
This is called Boyle'sLaw
4. How is volume related to temperature?
Go to http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm. This time click on volume, change the temperature. Note that pressure and the number of moles of He are constant.
Note what is happening to the volume.
Volume (L) Temp (K) Temp (C)
Graph your data.
What is the relationship?
Why does temperature need to be measured in Kelvin?
This is called Charles' Law
5. How is pressure affected by temperature?
Go to http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm. This time click on pressure, change the temperature. Note that volume and the number of moles of He are constant.
Note what is happening to the pressure.
Pressure (atm) Temp (K)
What is the relationship?
This is called Gay-Lussac's Law
6. How do moles come into this?
Go to http://intro.chem.okstate.edu/1314F00/Laboratory/GLP.htm. This time click on volume, change the number of moles. Note that pressure and the temperature are constant.
Note what is happening to the pressure.
Volume(L) moles
What is the relationship?
State Avogadro's Hypothesis.
How does this apply to what you are observing?
7. Summarize the Gas Laws:
a. Volume is related _____________to pressure.
b. Volume is related _____________to temperature(K).
c. Volume is related _____________to moles
d. Pressure is related _____________to temperature(K)
e. Volume = constant x ________________
BROWSE