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For all uninformed people and glassware users

Because it wasn't instructable material, but needed to be said, i put it up as a thread now this can happen to anyone... ok only amatures but still, and maybe non-amatures *cough cough*. What not to do with glassware: First of all after heating glassware do not-- Cool it quickly Put pressure on it Touch it when boiling or heating liquids do not-- Cap you container Insert anything that may block the gas escape Now i know you thinking that this is common sense which for some people is true but i don't need the next generation of destructible chemists with sliced up faces and hands (*coMugh coEugh*) It can happen to non amatures who just got accidentally careless, i just had a test tube with water, potassium perchlorate, sodium hydroxide, iron, iron oxide, and a little bit of ethyl alcohol blow up on me and yes you can call me an idiot

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Tombini8 years ago
I remember me and my dad heating up marbles to red hot using an LPG torch, rhen dropping them in water... Nice bang
its a lion10 years ago
yep, i have seen glass shatter from heating and then running cold water on it in person. that was a fun day in chem class... this holds true for clay too. i would assume metal as well, however i have never seen it crack after heating and then running cold water on it in person.
i think the rapid super-heating and immediate cooling (done several times or more) doesnt crack the metal but it makes it more brittle, please correct me if i am wrong
I can't remember which but it is called tempering or annealing... Used in industry
It depends on the metal, how much the temperature changes and how quickly - some metals are made stronger by heating and cooling.
Some clays and porcelain will do this. Most metals are a little more pliable and less subject to cracking (except under extreme conditions; don't heat metal to cherry red then plunge it into liquid nitrogen for instance). High carbon steel is a little less forgiving though.
westfw8 years ago
People like you are the reason science classes have been dumbed-down to the point that ... Arrgh, never mind.
My grandfather volunteered at a highschool as an engineering tutor after he retired. Some kid thought it'd be cool to steal a block of metallic-sodium (about the size of a "hotel" bar of soar). He stuck it in his back pocket and would've gotten away with it. But then it got moist and WHOOSSHHHH!!! They took him to the hospital with serious burns to his back side. ... Talk about getting "justice in the end"!!!!
Sweet.
Perhaps you mean "amateurs"?
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