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Chapter 3: Q6DQ (page 573)

Why is it sometimes possible to loosen caps on screw-top bottles by dipping the capped bottle briefly into hot water?

Short Answer

Expert verified

Due to the difference in volume expansion, the caps get to loosen up.

Step by step solution

01

Thermal expansion due to temperature rise

The rate of expansion of the cap and the bottle is different. Therefore on being dipped in the water, the cap is loosened. Once the cap and the bottle reach equilibrium, again they will get tightened up.

Hence, different volume expansion of the cap and the bottle is responsible for loosening caps on screw-top bottles by dipping the capped bottle briefly into hot water.

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