Answer to Question #61613 in Molecular Physics | Thermodynamics for Smritee

Question

Why it is possible to loosen caps on screw top bottles by dipping it on hot water???

Answer 1

When the cap of a screw top bottle is dipped briefly in hot water, there will be unequal expansion of the metal cap and the glass neck in which it is fitted. Since, the cap expands before the heat reaches the bottle and hence the metal cap will be loosened.