Why do thick glasses crack more easily when pouring hot water?

- Sep 28, 2018 -

     Why do thick glasses crack more easily when pouring hot water?

Generally pour boiling water into the glass, the thicker glass is more likely to burst the glass.Because the glass is cold, when the hot water is poured, the inner wall expands rapidly due to heat expansion and contraction.However, as glass is a poor conductor of heat, if the glass wall is very thick, the temperature will not be transmitted to the outer wall quickly, causing the inner wall to expand.But the outer walls remain the same, which can cause the glass to explode and shatter.


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And thinner cup, because the heat conduction is faster when pouring hot water, internal and external wall temperature difference is small, internal and external wall deformation difference is also small, so it is not easy to rupture.If you slowly pour in a small amount of water and shake the glass at the same time, making the inside and outside of the glass evenly heated, you will be better able to avoid cracking.


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