Why does glass crack when it goes from hot to cold or the other way around?



  1. 0 Votes

    Glass will typically break when a sudden change in temperature is not distributed evenly among the glass. However, the change in temperature would have to be pretty drastic. Running it under hot water and then sticking it in the fridge, for instance, most likely will not cause it to shatter. Additionally, it all depends on the type of glass, form, and thickness. Thicker glasses tend to break easier, as it takes a longer time for the temperature to spread evenly. Pyrex, for example, is able to withstand a sudden temperature change.

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