11 Grade Chemistry
mareegirlsName: Date:
Gas Laws Assignment
PLEASE USE THE LAB FOR THIS ASSIGNMENT
(PLEASE USE THIS) https://phet.colorado.edu/en/simulation/gas-properties
PhET Simulation: Use the link provided in the assignment page to access the PhET simulation related to Gas Properties. If you have issues with JAVA, please call the Help Desk or your teacher. Or watch the video at the bottom of the assignment page – it shows what happens as you follow these directions, then you can answer the questions. 2016-2017
Follow these directions carefully, or this lab won’t work correctly. Direction are in red.
Once you have opened the simulator, note the parameters that can be held constant in the upper right hand corner of the screen. (A parameter is another name for one of the controlling factors, or conditions, which affect the outcome of an experiment.)
From your class lesson pages
1. What parameter (quantity) is held constant for Boyle’s law?
2. What parameter is held constant for Charles’s law?
3. What parameter is held constant for Gay-Lussac’s law?
Using the Simulator
Click on the pump handle and pull it up and down to pump gas into the chamber until you have a reading of about 60 in the Heavy Species count for Gas in the Chamber.
Note the various gauges and controls. The simulator allows you to measure the temperature as well as add or remove heat. You can also read the pressure gauge. Notice that the gauges take a few moments to stop moving before you can read their values.
4. Move the person (on the left side of the simulator). What variable are you directly changing as the person goes left or right? Hint: the pressure and temperature may change as you move the person, but this is not the variable that is being directly changed.
Boyle’s Law
In the upper right corner of the simulator, click the button to maintain temperature as the constant. Make sure that you have gas particles in the chamber – pump the handle if not.
Push the person on the left towards the right side of your screen while observing the pressure gauge. Notice that the simulator applies ice to keep the temperature constant.
5. What happens to the pressure in the vessel as you move the person toward the right?
6. State the relationship between volume and pressure that you have just observed (include the type of relationship – direct or inverse). Please use a complete sentence or sentences to clearly show your understanding.
Charles’s Law
Reset the simulator (the reset button is near the middle of the right-hand side of the screen). (The Constant Parameter is still set to Temperature.)
Pump the handle until you have a reading of about 60 in the Heavy Species count for Gas. Watch the pressure gauge and once it stops increasing, now set the constant parameter to Pressure.
Increase the temperature by adding heat at the bottom of the simulator. Watch the gauges and the size of the container.
7. What happens to the person on the left side of the simulator? (How does the person move - left or right or not at all - and what does that tell you?)
8. State the relationship between temperature and volume that you have just observed. Please use a complete sentence or sentences to clearly demonstrate your understanding (include the type of relationship – direct or inverse).
Gay-Lussac’s Law
Reset the simulator. Set Volume as the constant parameter. Pump the handle until you have a reading of about 60 in the Heavy Species count. Notice the gauges and the volume of the container.
Use the heat controls at the bottom of the simulator to add heat, observing both the temperature and the pressure gauge.
9. As the temperature increases, what happens to the pressure in the simulator?
10. State the relationship between temperature and pressure that you have just observed. Please use a complete sentence or sentences to clearly demonstrate your understanding (include the type of relationship – direct or inverse).
When you have answered all 10 questions, save this document and submit it in the drop box for this lesson.
(PLEASE USE THIS) https://phet.colorado.edu/en/simulation/gas-properties