Question

Blaacket,
Why does a paper cup containing water mot catch
fire when placed over
flame?​

Answer 1

Answer:

A thin paper cup filled with water does not catch fire when placed over a flame because the paper cup does not become appreciably hotter than the water it contain. When paper cup is heated containing water, water absorbs the heat coming from the burning source and thus prevents the paper from reaching its ignition point.

Explanation:

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Answer 2

Answer

when water is present in the cup and fire id on, the water doesnot allow the paper to reach its ignition temperature and so it does not catch fire. but when water evapourates , the paper cup start burning.