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When liquid water is heated it changes from a liquid to a gas and then, usually, to a vapor.steam comes to mind
when green powder is heated, it turns black and a gas is produced. in irreversible changes, new materials are always formed. given that a gas is produced, which is a new material, heating green powder is an irreversible change.
Many mineral powders will change colour when heated, as they lose their water of crystallization.
No it doesn't, a turkey has two legs
Most materials expand when they are heated. If they are heated enough, they may change from solid to liquid, or from liquid to gaseous forms.
what changes take place when water is heated or cooled
materials usually expand when heated.
what changes take place when water is heated or cooled
the answer is particles !
Thermoschroism
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When liquid water is heated it changes from a liquid to a gas and then, usually, to a vapor.steam comes to mind
The main advantage of thermoplastic material is that it can be heated up, molded and then cooled again with no changes to the overall properties of the material (like it getting weaker and falling apart, for instance). Thermoplastics can be re-heated and re-molded as well, which is in contrast to thermosetting materials which can be heated and molded once but then not reset.
I assume as most materials do.
It changes into a gas
ferrous sulphate when it is heated it changes into red brown color