Question 66

Water is boiled at $$1\times10^5 $$ Pa pressure in a coffee maker equipped with an immersion-type electric_heating-element. The coffee maker initially contains 1 kg of water. Once boiling started, it is observed that half of the water in the coffee maker evaporated in 18 minutes. If the heat loss from the coffee maker is negligible, the power rating of the heating element is


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