How to calculate water heating time?

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TreShk02018-06-17 12:45:03

Physics

TreShk0, 2018-06-17 12:45:03

How can you calculate the time for heating water, for example from 20 C° to 100 C° at a fire temperature of 100 C°?

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2 answer(s)

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Maxim Moseychuk, 2018-06-17
@TreShk0

It is necessary to multiply the temperature difference by the heat capacity of water, multiply by the mass of water and divide by the power of the heat source.
Only this task delivery is abstract, because efficiency, evaporation, convection, radiation are not taken into account.

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Arseniy Efremov, 2018-06-17
@arusef

It takes about 4200 joules of energy to heat 1 kg of water by 1 degree. Therefore, it is necessary to take into account the volume of the vessel and the thermal conductivity of the bottom. But the temperature of the fire does not say anything, except for the peak temperature of the system.