Charles's law demonstration - GIF

Charles's law demonstration. The law states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure.

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Previously:

https://www.homemadetools.net/forum/...584#post193345
https://www.homemadetools.net/forum/...420#post127358
https://www.homemadetools.net/forum/...906#post171516
https://www.homemadetools.net/forum/...421#post127361
https://www.homemadetools.net/forum/...793#post190532

and ... you can derive it from the Ideal Gas Law :: PV=nRT

Charles Law is V/T=k where V=Volume, T=Temperature, k=a constant

So it P is the same (atmospheric for the balloons) and n is the same (the balloons keep the gas in their enclosed volume) and R is a constant, we can rearrange...

For ambient temperature Va/Ta=nR/P

For cold temperature Vc/Tc=nR/P

so Va/Ta = Vc/Tc and that is also Va/Vc = Ta/Tc

yup I coulda told you it shrinks up when it gets cold.

Quote:

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Originally Posted by marksbug

yup I coulda told you it shrinks up when it gets cold.

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I WAS IN THE POOL!

That's a cool demonstration It seems to me like the balloons would have become brittle and cracked open.

I worked at an optics company where I was able to "play" with liquid nitrogen for almost 10 yrs. I too was of the thought that things became fragile and shattered like glass when frozen to those temperatures. Ends up, that most things are pretty resilient. I was actually difficult to get regular items cold enough to cause them to shatter. I even had one of those small oranges submerged for almost 5 minutes. Then took it outside to try and shatter it on the ground. While the outside broke, the inside was still not solid, but rather a mush consistency. Pretty much lost interest in trying to deep freeze things after that. It was still fun to throw up a cup full of liquid nitrogen into the air at flying insects. They tend to die in mid flight. Of course this was all done wearing proper PPE.........

I do remember a banana that that totally shattered when hit with a hammer....but don't recall the exposure time....

Quote:

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Originally Posted by that_other_guy

I do remember a banana that that totally shattered when hit with a hammer....but don't recall the exposure time....

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I saw a demonstration where a rose was dipped in liquid nitrogen and it was crushed to bits in the guy's hand.