Question

seema prepared tea in a paper cup by heating it over a small flam . explain why the paper cup did not catch fire.​

Answer 1

Answer:

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Explanation:

This is because when we heat the paper cup containing water, then the heat supplied to the paper cup is transferred to water inside it by conduction. Due to continuous transfer of heat from Paper Cup to water , the paper cup does not get heated to its ignition temperature. Hence the paper cup does not catch fire.

Answer 2

Answer:

A substance catches fire only if it reaches it ignition temperature. Here, the paper cup did not catch fire because the heat from the flame was transferred to the tea inside the cup. Due to this, the cup does not reach the ignition temperature and hence does not catch fire.