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Is there anything that wasn't explained by the conventional explanation?
Quote from: Bored chemist on 27/03/2022 10:43:24Is there anything that wasn't explained by the conventional explanation?
Quote from: Bored chemist on 28/03/2022 22:46:52Quote from: Bored chemist on 27/03/2022 10:43:24Is there anything that wasn't explained by the conventional explanation?What's the conventional explanation?
https://en.wikipedia.org/wiki/Superheated_waterSuperheated water is liquid water under pressure at temperatures between the usual boiling point, 100 °C (212 °F) and the critical temperature, 374 °C (705 °F). It is also known as "subcritical water" or "pressurized hot water". Superheated water is stable because of overpressure that raises the boiling point, or by heating it in a sealed vessel with a headspace, where the liquid water is in equilibrium with vapour at the saturated vapor pressure. This is distinct from the use of the term superheating to refer to water at atmospheric pressure above its normal boiling point, which has not boiled due to a lack of nucleation sites (sometimes experienced by heating liquids in a microwave).
Is this Wikipedia article considered a conventional explanation?
Quote from: hamdani yusuf on 29/03/2022 14:12:47Is this Wikipedia article considered a conventional explanation?This bit is."This is distinct from the use of the term superheating to refer to water at atmospheric pressure above its normal boiling point, which has not boiled due to a lack of nucleation sites (sometimes experienced by heating liquids in a microwave)."The explanation is " due to a lack of nucleation sites "
My experiments also show that microwave water superheating is a different phenomenon from bumping, because it can be done slowly.
Quote from: hamdani yusuf on 30/03/2022 03:11:51My experiments also show that microwave water superheating is a different phenomenon from bumping, because it can be done slowly.Heating water slowly in a clean test tube with a flame can also cause bumping.
https://en.wikipedia.org/wiki/Bumping_(chemistry)Bumping is a phenomenon in chemistry where homogeneous liquids boiled in a test tube or other container will superheat and, upon nucleation, rapid boiling will expel the liquid from the container. In extreme cases, the container may be broken.[1]Bumping occurs when a liquid is heated or has its pressure reduced very rapidly, typically in smooth, clean glassware. The hardest part of bubble formation is the formation of the small bubble; once a bubble has formed, it can grow quickly. Because the liquid is typically above its boiling point, when the liquid finally starts to boil, a large vapor bubble is formed that pushes the liquid out of the test tube, typically at high speed.
Have you tried to de-superheat the water by slowly dipping a metal object into it?
I've got an electric air heater which is useful to bend acrylic plates. The hot air can reach up to 300°C, which should be enough to boil demineralized water in a smooth glass, and bring it to superheated state, if the microwave is not necessary.
Of course I haven't.I know that the best approach is to avoid superheating in the first place or, if you know that it has happened, you let it cool- undisturbed.
or you could use a candle.So what?
Then you have no evidence that it was superheated.
ordinary candles are too small,
Quote from: hamdani yusuf on 02/04/2022 05:40:21Then you have no evidence that it was superheated.In a laboratory context, you often have a thermometer...
I assure you that you can boil a test tube full of water with a candle flame.
It hardly matters how you heat the water.Superheating is nothing to do with microwaves.
Quote from: Bored chemist on 02/04/2022 11:37:01It hardly matters how you heat the water.Superheating is nothing to do with microwaves.My experimental results suggest otherwise.I'll post them here soon after I finished uploading them.