Name
Date
Charles’ Law: The Relationship between Volume and Temperature
Period
Problem
What happens to the volume of a gas if the temperature is increased at constant pressure?
Pre-Lab Question
Write a hypothesis.
Procedure
1. Dip your soda can into the bubble solution. Get a thin film of bubble solution over the opening of the can.
2. Gently place your hands around the can. DO NOT CRUSH THE CAN!
3. Make observations about what happens to the bubble solution over the opening of the can. Record your
observations into the data table below.
4. Dip a cotton ball into the alcohol solution.
5. Rub the alcohol solution on the outside of the can.
6. Make observations about what happens to the bubble solution over the opening of the can. Record your
observations in the data table below.
7. Clean up your area and answer the post – lab questions.
a. Rinse off the can. Leave the can at your station for the next class period.
b. Clean up any spilled bubble solution.
Data
Your Actions
Observations.
Placing Your Hands
Around the Can
Rubbing Alcohol on the
Can
Post-Lab Questions
1. What your original hypothesis correct? If not, what would be your new hypothesis?
2. Write an algebraic equation for the relationship between temperature and volume before and after either of the
changes you made.
3. Describe the relationship between temperature and volume.
OVER (Boyle’s Law)
Boyle’s Law – The Relationship between Pressure and Volume
Objective: to determine the relationship between the pressure and volume of a confined gas.
The gas you are investigating is air, and it will be confined in a syringe along with a marshmallow. The marshmallow will help you
SEE what is happening to the pressure inside the syringe. Temperature is constant. This relationship was first established by one of the
original chemists, the great Robert Boyle in 1662 and has since been known as Boyle’s law. In 1662, the toothbrush had yet to arrive
in Western Europe. Should anything ever get you down, remember this dude and get back to work.
Problem
What happens to pressure as you change volume at constant temperature?
Pre-Lab Question
Write a hypothesis
Procedure
The syringe should contain an intact marshmallow. If not, get one from your teacher. Remove the Luer lock cap and open the syringe
to 30mL. Place the cap back on.
1) Observe the marshmallow before you begin. What is the starting pressure inside the syringe?
2) Depress the plunger from 30 to 20 mL. Note the appearance of the marshmallow. Note the force required to depress the
plunger this far.
3) Continue and depress the plunger to 10mL. Note appearance and relative force applied.
4) Depress the plunger to 5mL. Note appearance and relative force applied.
5) Release the plunger and note where it moves.
6) Retract the plunger to 40mL then to 50mL then stop. Note the force required to move it outward as well as the appearance of
the marshmallow.
Data & Observations
Your Actions
Observations.
Depressing the Plunger
Retracting the Plunger
Post-Lab Questions
1. What your original hypothesis correct? If not, what would be your new hypothesis?
2. Is the relationship between pressure and volume linear? Think about the amount of force required to depress the
plunger at various volumes.
3. Write an algebraic equation for the relationship between temperature and volume before and after either of the
changes you made.
4. Describe the relationship between pressure and volume.
5. Describe the graphical nature of pressure and volume.