Q 1.4: Why is
glass considered a super cooled liquid?
Solution:
Glass is a amorphous solid so all amorphous solid have a
tendency to flow, though very slowly. Hence, glass is considered as a super
cooled liquid. That is why the glass windows and doors become slightly thicker
at the bottom than at the top with the time.
'amorphous solid have a tendency to flow slowly' what does it mean? What where how to flow.....plzzzz explain
ReplyDeleteIt simply means that in amorphous solids the molecules are allowed to move, though very slowly.
DeleteThis is not true. In Mediaeval times panes of glass were often made by the Crown glass process. A lump of molten glass was rolled, blown, expanded, flattened and finally spun into a disc before being cut into panes. The sheets were thicker towards the edge of the disc and were usually installed with the heavier side at the bottom.
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ReplyDeleteGlass is an amorphous solid like liquids it has a tendency to flow through very slowly the proof of this fact that the glass window of the door become slightly thicker at the bottom than the top with the time. This is the evidence due to the reason that last slows down very slowly and makes the bottom portion slightly thicker.
ReplyDeleteany how can we stop this process of flow of molecules in glass ?
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ReplyDeletethank you
ReplyDeletewhy is glass considered a super cooled liquide ?
ReplyDeletewhy is glass considered a super cooled liquide ?
ReplyDeleteI dont know yet. I'm so stupid at this subject fireboy and watergirl
ReplyDeleteGlass is sometimes called a supercooled liquid because it does not form a crystalline structure, but instead forms an amorphous solid that allows molecules in the material to continue to move. However, Scientific American indicates that amorphous solids are neither supercooled liquids nor solids. More games
ReplyDeleteGlass is sometimes called a supercooled liquid because it does not form a crystalline structure, but instead forms an amorphous solid that allows molecules in the material to continue to move. However, Scientific American indicates that amorphous solids are neither supercooled liquids nor solids.
ReplyDeleteTrue solids form crystalline structures that lock molecules into place. They retain their shape unless the temperature increases to above their melting point. However, glass, amber and plastic do not form such solids when their liquid form cools. While glass is more rigid than liquid, it is not as ordered as crystalline solids.
High school chemistry teachers and tour guides often erroneously point to European cathedral windows as evidence that glass remains a supercooled liquid. The glass in these windows is thicker at the bottom than at the top. However, Scientific American refutes these claims due to the slow-moving nature of glass molecules and Egyptian glass that is older but has the same thickness at the top and the bottom. The reason for the melted appearance of cathedral windows is likely due to the European method of glass blowing, which included blowing cylinders and flattening them. For an unknown reason, the artisans building the windows preferred to install the heavier glass at the bottom of the window.helpful resources
Hope this helps u :)