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eimsori [14]
3 years ago
5

when an electric kettle containing cold water is switched on, the water in it starts boiling after a few minutes. what is the so

urce of the heat energy of the boiling water?
Chemistry
1 answer:
Virty [35]3 years ago
6 0
The source of heat energy would be the electrical energy
By this i mean that the electric kettle converts the electrical energy from the outlet into heat energy
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Determine the amount of heat energy in joules required to raise the temperature of 7.40g of water from 29.0OC to 46.0 OC.
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Answer: The amount of heat energy in joules required to raise the temperature is 526 Joules

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

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Initial temperature of the water = T_i = 29.0°C

Final temperature of the water = T_f  = 46.0°C

Change in temperature ,\Delta T=T_f-T_i=(46.0-29.0)^0C=17.0^0C

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Q=7.40g\times 4.184J/g^0C\times 17.0^0C

Q=526J

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