The nail bottle demonstration is one that many of us have conducted in our classes. To perform this demonstration, 2 – 3 mL of ethanol is placed into a plastic bottle that has two nails punctured into opposite sides of the bottle. After stoppering the bottle, a Tesla coil is touched to one of the nails. A spark jumps from one nail to the other, which initiates the combustion of vaporized ethanol inside the bottle. We recently filmed this reaction with our high speed video camera.
In this Activity, students explore buoyancy with helium-filled Mylar balloons.
In this Activity, students compare the combustion of different substances such as a glowing wooden toothpick and lit birthday
In this Activity, students assemble a Cartesian diver and observe the effects of changing the pressure and temperature.
In this Activity, students determine the concentration (percent volume) of oxygen in air.
The relationship between the volume of a gas and the pressure it exerts, known as Boyle's Law, is shown with a J-tube.
The vapor pressures of butanol and diethyl ether are compared using barometers to show the effect of hydrogen-bonding on vapor pressure.
The vapor pressures of chloromethane and dichloromethane are compared using barometers to show the effect of polarity on vapor pressure.
The vapor pressures of methanol and ethanol are compared using barometers to show the effect of molecular size on vapor pressure.