1. Tardigrade
  2. Question
  3. Physics
  4. Assertion (A): When hot water is poured in a thick glass tumbler then the tumbler breaks Reason (R): Glass is a bad conductor of heat

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Assertion (A) : When hot water is poured in a thick glass tumbler then the tumbler breaks
Reason (R) : Glass is a bad conductor of heat

Thermal Properties of Matter

Solution:

When hot water is poured into a thick tumbler its inner surface expands. However, Since glass is bad conductor of heat , the heat does not go to outer surface and the expansion of outer surface of the tumbler is quite small. Due to uneven expansion of the outer and inner surfaces, the tumbler breaks. because the heat will try to escape but the glass would not allow it and in the process ultimately glass breaks down.