Volume / Temperature = Volume / Temperature

This is a direct relationship -- this link describes quite a bit:

http://en.wikipedia.org/wiki/Charles%27s_law

Click on the animation to the right to view a full-sized animation.

**CAUTION:**There cannot be any negative or zero values for temperature, so this relationship must be solved using Kelvins!

Remember, absolute zero is -273 degrees Celsius -- it's the temperature at which particle motion stops.

Kelvin temperature = Celsius temperature + 273

Here's one example of a laboratory:

I had access to large, plastic buckets in one school which made it easier to submerge the flask in the cold water bath. I didn't put glass medicine dropper valves in the stoppers, we just put our fingers of the hole in the stopper.

Here's a stopper size chart for several sizes of Erlenmeyer flask (just ignore the Product Numbers):

http://www.phytotechlab.com/pdf/FlaskStopperGuide.pdf

You can make a graph and extrapolate to absolute zero. My students only had two points and many would miss -273 degrees Celsius, but it was exciting when we got close!

I found a simple laboratory procedure:

http://www.newwestinghouse.org/ourpages/auto/2011/5/4/41324522/Charles_s%20Law%20Lab.pdf

Here is a video of a sample mathematical solution for Charles' Law:

http://www.kentchemistry.com/links/GasLaws/charles.htm

And here is a worksheet of 5 problems with answers:

http://mmsphyschem.com/chuckL.pdf

Please let me know about your experiences, ask if you have any questions or if you have ideas for other topics for this blog.

And, check out

**my lab book "Chemistry on a Budget"**at:

http://www.amazon.com/Chemistry-Budget-Marjorie-R-Heesemann/dp/0578129159/ref=sr_1_1?s=books&ie=UTF8&qid=1389410170&sr=1-1&keywords=chemistry+on+a+budget

I hope you're having a good week!