Chemistry Day Picture Page 1

Students filled the flask with CO₂ and then blew bubbles into it. Since CO₂ is more dense then the surrounding atmosphere, the bubbles which normally sink to the ground, floated rather nonchalantly in the flask.

Students used Calcuim Carbide mixed with water in a plugged tube. The Calcuim Carbide reacted with the water producing acetylene gas. The students then ran a spark across two nails in the tube igniting the acetylene. The resulting reaction, with a loud boom, shot the plug towards a uninhabited wall.

FIRE!!

This University grad student is demostrating just how little energy (the heat from her hand) it takes for liquid nitrogen to evaporate. Please don't try this yourself, unless you really know what you are doing.

Bits and pieces of rubber balls, flowers and other assorted items after a bath in the liquid nitrogen.

One of the properties of a solution is how well it conducts electricity. Here are various electrolytes and a rather happy student.

Demostration of exactly how flamable different gases are. Helium is inert and not at all flammable, while hydrogen is quite flammable. A balloon with both hydrogen and oxygen was a the most spectacular.

BOOM!!!

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Students filled the flask with CO₂ and then blew bubbles into it. Since CO₂ is more dense then the surrounding atmosphere, the bubbles which normally sink to the ground, floated rather nonchalantly in the flask.
Students used Calcuim Carbide mixed with water in a plugged tube. The Calcuim Carbide reacted with the water producing acetylene gas. The students then ran a spark across two nails in the tube igniting the acetylene. The resulting reaction, with a loud boom, shot the plug towards a uninhabited wall.
FIRE!!
This University grad student is demostrating just how little energy (the heat from her hand) it takes for liquid nitrogen to evaporate. Please don't try this yourself, unless you really know what you are doing.

Bits and pieces of rubber balls, flowers and other assorted items after a bath in the liquid nitrogen.
One of the properties of a solution is how well it conducts electricity. Here are various electrolytes and a rather happy student.
Demostration of exactly how flamable different gases are. Helium is inert and not at all flammable, while hydrogen is quite flammable. A balloon with both hydrogen and oxygen was a the most spectacular.
BOOM!!!