PURPOSE: To demonstrate Charles' Law.

DESCRIPTION: A hollow sphere filled with air is connected by a tube to a pressure gauge on an overhead projector. Place the sphere in ice water (T=273K) and in boiling water (T=373K), and read the pressure for each as well as at room temperature. Calculate P/T=constant, Charles' Law. Below are photographs showing the pressure meter at each of the points above.

SUGGESTIONS:

REFERENCES: (PIRA 4E30.10)

EQUIPMENT: Hollow air sphere with tubing, pressure gauge, beaker of boiling water on hot plate, styrofoam bucket of ice water, styrofoam bucket of liquid nitrogen, overhead projector.

SETUP TIME: 10 min.