why does a glass filled with water crack when it is placed in a fridge ?

Answer 1

There would be no reason for it to crack unless: 1. The 'fridge is cold enough to freeze the water, or 2., the glass is very warm and the 'fridge is very cold, and a cold part comes into direct contact with the warm glass.

In the second place, it is the local contraction of the glass that stresses the internal structure of the glass and brings on the cracking.

In the first, and more likely, the water freezes.

Physically, water behaves as most liquids in contracting as it gets colder, but this is only true to 4 degrees C (aprox.) Water is nearly unique in that as it starts to freeze, the molecules line up into a spiral structure that is less dense and so larger for the amount of water in it. Water expands as it freezes, Ice is both larger and less dense than the equivalent amount of liquid water.

So as it freezes, the ice formed rises to the top, and seals in the remaining liquid, and if the freezing goes on long enough, the water that has solidified and expanded as it did begins to push hard on the glass, and eventually will fracture it.

This is also how water breaks rocks up in areas of thawing and freezing.

And if it were not this way, we would have little or no life on the earth because all the water would be frozen at the bottom of lakes and rivers and oceans, and only a very thin skin would ever actually melt. Not even if Al Gore says otherwise!!

Unfortunately for your glass, and fortunately for life on earth, water does expand enough as the crystals form to float on the liquid, and so the bodies of water are mostly liquid with only a thin, relatively, layer of ice, and life can go on.

The power of the expansion is very great, and will crack quite large rocks. Also, the volume of water released when say Greenland melts is less than the volume of ice presently there, with corrections for the pressure density changes..

Answer 2

If the water was warm, then what is going on would be from the internal stress. If glass heats up it will expand. If the heat cools down it will shrink.
If you have a glass with hot water placed in a fridge, the glass on the inside would be expanding, and the outside of the glass will be shrinking. This will have the glass be pulled apart on one side and pushed together on the other. The resulting internal stress will cause a crack that the water leaks out of.

Answer 3

It doesn't necessarily. But water expands in volume when it freezes, so if there is no room for the expansion, such as in a full bottle with a lid on it, the pressure of the expanding water cracks the glass.

Water in a glass that is not covered will usually expand above the top of the glass and not exert pressure that cracks the glass.

Glass will also crack when exposed to sharp changes in temperature, such as glasses that are cold from an iced beverage suddenly plunged into hot dishwater often crack.

Answer 4

Water unlike metals tend to expand when frozen and contracts when heated.
When a glass bottle filled with water is placed in fridge,it expands putting pressure on the glass bottle and hence breaking it.
However this can be avoided by making sure that the bottle is not completely filled with water.If some space is left the water will expand in that region causing no harm to the bottle.

Answer 5

It doesn't. You placed water in a fridge. If you placed it in a freezer, it would not crack. There is no lid on your glass, therefore there is a place for water to go when it expands. Water expands when it is frozen because of the molecules drifting further and further apart.

Answer 6

When water freezes it causes the water molecules to become rigid in a grid like state and because of that they are forsed to make more room which is why the glass will crack and give the observer the illusion that the water has expanded.

Answer 7

Actually mine never has done that. But I expected it to. Yours must be thinner glass. See, the water in the glass will expand as it freezes. (Ice takes up more space than water.) If the temp. inside the fridge is colder than usual, the water will freeze faster and will press against the glass faster. Also I imagine the glass itself becomes more brittle as it gets colder.

Answer 8

no longer a huge fan of them myself (I choose a Bridie), yet i think in the event that they're in the doorstep you do no longer constantly savour what you have. there's a butcher someplace in ny State that caters to an ex-pat marketplace... keep in mind this from seeing somebody attempting to source something else like lorne sausage or ayrshire Sir Francis Bacon a on an analogous time as back. record Hudson is right approximately them being Scotch Pies, yet they're additionally sometimes pronounced as Mutton Pies (tend to be made out of mutton as against mushy youthful lamb). record H, 9/10 on your answer... Scotch Eggs are no longer Scottish, they're an english dish and the call is an abbreviation of Scotched Eggs, no longer Scottish Eggs. Scotching meat includes hacking it to the two tenderise, or extra or less mince, and this refers back to the sausage meat surrounding the egg. something it rather is scotched is now sometimes additionally recognized as being lined in bredcrumbs in the past cooking. That being pronounced, they're very nicely-known in Scotland LOL

Answer 9

hahaha no.

if you freeze it, the water will expand and crack the glass, but not if you just put it in the fridge.

hahaha

Answer 10

when the water freezes...it brings pressure to the glass...so it eventually cracks.