Ive never done swirling, but if you heat to boiling, then let cool, it removes a lot of gas, and lets you superheat tap water.
On Fri, Jul 15, 2011 at 2:27 PM, Harry Veeder <[email protected]> wrote: > > > ----- Original Message ----- >> From: Stephen A. Lawrence <[email protected]> >> To: [email protected] >> Cc: >> Sent: Friday, July 15, 2011 5:03:11 PM >> Subject: [Vo]:They say liquid water can't be hotter than boiling... >> >> So here's a cute experiment, done by accident while on vacation. >> >> Take a smooth china mug, and fill it with water. >> >> Stir the water, so it's swirling nicely (if you don't do this only the >> surface will get hot and the experiment probably won't work). >> >> Put it in a microwave on high power for a minute or two. I used 2 minutes, >> but >> the microwave in question was probably not very high power. >> >> Take it out, stir it *again* so it's swirling nicely, and pop it back into >> the microwave for another minute or two. >> >> Take it out. There may be a few bubbles, but on a good morning, it will >> *not* >> be boiling, not what most of us mean by boiling, anyway. >> >> Drop a teabag into the cup of water which isn't boiling. >> >> Whoa, nelly -- bubbles galore! Now it's boiling! >> >> Gosh, what was in the cup before I put the teabag in? > > I've heard you can use a microwave oven to superheat distilled water in a > smooth china mug. > This news to me that you can superheat ordinary water as long as the water is > swirling in the mug. > Harry > > > >> > >
