[China Glass Net] Injecting hot water into glassware, does the temperature of the glass rise at the same time? Is the glass back stressed by expansion? Glass is a poor conductor and is fragile. When the temperature difference between the inside and outside of the glassware is too large, the expansion inside and outside is inconsistent. For example, when boiling water is poured into a cold glass bottle, the circumference of the bottle is increased, but the temperature of the glass outside the bottle has not risen to the same as in the bottle, so the outer circumference is not increased, so it is squeezed by the glass inside the bottle. Cracked.
Glassware that can withstand cold and heat, choose a glass with a small expansion rate, the thickness of the vessel should be small, and the shape of the vessel should not be too sharply curved. Therefore, the flask for heating the chemical experiment is to use a round bottom flask.
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