Raoult's Law, which describes the vapor pressure of a mixture, is demonstrated using barometers.
Another mixture of decane and diethyl ether is used to demonstrate Raoult's Law. Students are asked to predict the vapor pressure of the mixture.
Another mixture of decane and diethyl ether is used to demonstrate Raoult's Law. Students are asked to predict the vapor pressure of the mixture, and the answer is shown.
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.
A synthetic diamond wafer and an aluminum disk are held between a thumb and forefinger (to provide heat). When pressed against an ice cube, the diamond penetrates more rapidly than does the aluminum.
Butter is used to glue a piece of pasta to each disk. When the edges of the disks are immersed in hot water, the butter on the diamond melts more rapidly, releasing the piece of pasta.
Mercury(II) iodide is heated to convert it from its red low-temperature alpha form to its yellow high-temperature beta form.
When the beta form of mercury(II) iodide cools to below the transition temperature of 126°C, it returns to the red/orange alpha form.