why does glass break when you transfer hot glass to cold water?

Question

please do answer.. :D thanks :D

Answer 1

Some people here have missed the point. Glass isn't a wonderful conductor of heat, so when you put hot glass into cold water the surface rapidly contracts, whilst the inside of the glass remains the same volume (until thermal equillibrium is reached). This is why the glass cracks.

Also, to people who say the molecules 'slow down': The average velocity of the molecules is zero. The particles are oscillating and the period (time) of oscillation increases as the temperature drops. In other words, the frequency of oscillation drops. The frequency of oscillation is related to the volume.

And for anyone who says 'glass is a liquid so the molecules do move' I will say this: Glass is NOT a liquid. Glass is an AMORPHOUS SOLID. The molecules are locked in a structure BUT it isn't a crystal structure, the molecules are randomly positioned. They are still locked, however, and do not move OTHER than the natural oscillation (related to the temperature).

And Coldfire: You are wrong. The oscillation due to temperature follows Gaussian statistics and, consequently, is too random to contribute to any 'shattering'. The shattering is due to the difference in volume of the inside of the glass and the surface, nothing more.

Answer 2

In the cold water the glass molecules slow down and contract. When it is placed into hot water they rapidly being to move and rapidly expand. This rapid expansion can cause a fracture and break the glass. It's the same with ice cubes....it's why they crack when put into a warm drink.

Oops, got it backwards from your question. The same thing works in reverse with a rapid contraction.

Answer 3

Because the glass molecules expand when heated and rapidly contract when a change to cold temperature occurs.

Answer 4

it is real, in some particular, carefully controlled circumstances, warmer water freezes quicker than less warm water. that is by using fact the get away of warmth of evaporation might reason the warmer water to lose its warmth and crystalize at latest. It is going from being a liquid to stable rapidly. Take a cup of boiling water exterior in Antarctica, throw it interior the air, and it will hit the floor as ice. Take a 2d cup of 40 degree F water, do the comparable, and it will nevertheless be water whilst it hits the floor.

Answer 5

Much in the same way that you can smash glass using a resonant frequency, you can smash it by a rapid heat change... This is due to the Molecules Rapidly "Vibrating"
eventually reaching a resonant frequency and shattering.

Answer 6

sudden contraction of glass molecules