Can you explain this seemingly simple chemistry demo?
A simple chemistry demonstration - sometimes called "the rising waters" or "the anti-gravity flask." Most people would explain the rising water as the result of the oxygen in the flask getting used up, but that's actually totally wrong.
Watch to learn why the water actually rises, and then try it at home!
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Thanks for the great explanation! I now know that I’ve been lied to all my life.
@rmahaffy
Жыл бұрын
Lol, happy to help 😅
Nice explanation 😃
@rmahaffy
Жыл бұрын
Thanks 🙂
Thank you for the explanation- I would be interested to know if we can duplicate the effects (and prove the cause proposed) by putting something cold in place of the candle, like a piece of dry ice or something?
@rmahaffy
Жыл бұрын
That's a good idea!
I found out something new today
@rmahaffy
Жыл бұрын
🥹🥲😃😃😃😃🔥🔥🔥🔥🔥🔥🔥❤️❤️❤️
Really cool explanation! What did you use for your animation? I am trying to figure out some different animation styles and I really liked that one! One thing you could toss in your explanation (if you wanted) is the co2 in the product continues to contribute pressure but the hot water has in the product is going to condense into liquid and stop contributing to pressure. That will cut your product gas in half so you go from the about 48 gas molecules in the reactants to about 30ish in the products (I don’t remember the ratio for the reaction) To see how much the water condensation effects the pull of the water up is a bit more challenging experimentally. I guess you could heat a hot coil or something with similar temp to the candle with no gas emission and cover it and see how high the water goes up. I’ve tried for a while to make a self contained chamber with a balloon in top that will expand then contract based on the temp and pressure and number of gas molecules. But anyway, rad!
@rmahaffy
Жыл бұрын
You're right of course! I'm always a little suspicious of this though since the combustion gases will remain very hot and this system isn't truly closed (like a bomb calorimeter would be), so a lot of those hot gases escape as the flask is lowered, and then I think it's a reasonable assumption that the overwhelming mechanism is the temperature change of the gas in the headspace of the flask. Would be interesting to try to test it though. The animation is done in Adobe animate. Check out @TipTut for tutorials!