4E20.25-Boyle’s law apparatus

Video: Watch this demo

Instructor’s video

Description: This demo can be used in two ways to show the relationship between pressure and volume.
One: Connect the meter to the external syringe and change the syringe volume.
Two: Connect the meter to the fixed volume gas ball and place the ball in LN2.

Equipment:

• Boyle’s law apparatus
• LN2
• Glass container
• Overhead Projector
• Protective gloves

Setup Procedure:

1. Place on the overhead projector and focus.

Demonstration Procedure:

1. Connect the pressure meter to the syringe.
2. By changing the volume of a closed container, you can show the change in pressure
   • (volume decrease = pressure increase)
3. Disconnect the syringe and connect the fixed volume gas ball
4. Place the gas ball into the container of LN2 to show that pressure depends on temperature
   • (temperature decrease = pressure decrease)

Liquid Nitrogen
Use caution when working with liquid nitrogen, as it is very cold.
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