12/8/08
Post date: Dec 07, 2008 9:24:9 PM
Bell Activity: Each of the 3 gas laws assumes that one value is constant. Write the names of the gas laws and what value is constant for each one.
Gas law simulation (in class)
Right click on the following link, and click "Open in a new window": http://www2.hn.psu.edu/faculty/dmencer/ideal/ideal2.html
For each of the 3 gas laws, we will change one variable and measure one variable. Use the buttons near the top to select which variable we will measure (or observe)
Before you begin each gas law practice, record values for temperature, pressure, and volume
Boyle's Law
Constant parameter is temperature - this will not change
We are measuring pressure with Boyle's Law.
Based on Boyle's Law, if you increase the volume, what do you expect to happen to the pressure?
Increase the volume. Record the new pressure
How did the pressure change when you increased the volume? Is this consistent with your prediction? Is this consistent with Boyle's Law?
Gay-Lussac's Law
Constant parameter is temperature - this will not change
We are measuring pressure wth Gay-Lussac's Law
Based on Gay-Lussac's Law, what do you expect to happen to pressure when you increase the temperature of the gas?
Increase the temperature of the gas, then record your new temperature and pressure
How did the pressure change when you increased the temperature? Is this consistent with your prediction? Is this consistent with Gay-Lussac's Law?
Charles's Law
Constant parameter is pressure - this will not change
We are measuring volume with Charles's Law
Based on Charles' Law, what do you expect to happen to the volume of the gas as you increase temperature?
Increase the temperature of the gas, then record your new volume and temperature.
How does the volume change when you increase the temperature of the gas? Is this consistent with your prediction? Is this consistent with Charles's Law?
Gas law simulation (at home, for extra practice)
Right click on the following link, and click "Open link in new window" : http://phet.colorado.edu/simulations/sims.php?sim=Gas_Properties
Click the green "Run Now!" button
When the program opens, pump two times on the bike pump to get some gas in your containter
For each law, select a "constant parameter" on the right side of the window. These are the same as the values that stay constant which you wrote down for your bell activity.
Between your investigations with each law, click "Reset" and put a new two pumps worth of air into the chamber
Boyle's Law
Constant parameter is temperature
Write down the initial temperature and pressure
Based on Boyle's Law, if you increase the volume, what do you expect to happen to the pressure?
Drag the little man backward to increase the volume. Wait for the temperature to return to what it started at, then record the new pressure
How did the pressure change when you increased the volume? Is this consistent with your prediction? Is this consistent with Boyle's Law?
Gay-Lussac's Law
Constant parameter is temperature
Write down the initial temperature and pressure
Based on Gay-Lussac's Law, what do you expect to happen to pressure when you increase the temperature of the gas?
Drag the heat control to "add" to increase the temperature
Record your new temperature and pressure
How did the pressure change when you increased the temperature? Is this consistent with your prediction? Is this consistent with Gay-Lussac's Law?
Charles's Law
Constant parameter is pressure
Write down the initial pressure and temperature
Based on Charles' Law, what do you expect to happen to the volume of the gas as you increase temperature?
Drag the heat control to "add" to increase the temperature
How does the volume change when you increase the temperature of the gas? Is this consistent with your prediction? Is this consistent with Charles's Law?
District assessment on states of matter - due in class