We can boil water in a paper cup while the paper catches fire easily. Explain the process?
Answers
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Answer:
Take two paper cups. Half full one of the cups with water and keep the other empty. Take two spirit lamps and put these two paper cups, (one empty and other half filled) above the flame carefully.
What do you observe?
You observe that the empty cup catches fire immediately. However, the paper cup containing water does not catch fire immediately and can hold for quite sometime on the flame. This is due to the fact that the temperature of empty paper cup rises fast, till it reaches the stage where it catches fire. In case of the other paper cup, half filled with water, the temperature does not rise that fast as the water present also absorbs some heat. Hence, this cup does catch fire.
Explanation:
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