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The boiling point of oil is higher than water and absorbs more heat .When hot oil is poured in a glass container the heat is conducted through the cold glass which expands and breaks while in hot water the heat energy absorbed is less and the glass heat is dissipated slowly to avoid sudden expansion.

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13y ago
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8y ago

Very cheap or extremely thin glass can, yes - that's why modern heatproof glass was developed.

Any glassware designed for kitchen use is safe from breakage if hot liquids are poured into it, but any glass might break if it becomes very hot, and then is suddenly plunged into cold water.

Glass cracks because of the temperature difference between the inner and outer layer, glass is a poor conductor, so the inner layer expands faster than the outer layer, this stress is what causes the crack, so the thicker a glass is, the longer it takes for the heat to transfer to the outer layer, so the more likely it is to crack.

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Q: Why does hot oil break glass and not hot water?
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