The electric kettle shown below is used to boil water.
(a) After the water has boiled, the temperature of the water decreases by 22 °C.
The mass of water in the kettle is 0.50 kg.
The specific heat capacity of water is 4200 J/kg °C.
Calculate the energy transferred to the surroundings from the water.
Help with homework?
2017-09-23 10:52 pm
回答 (1)
2017-09-23 10:58 pm
Energy transferred to the surroundings from the water
= m c ΔT
= (0.5 kg) × (4200 J/kg °C) × (22 °C)
= 46200 J
= 46000 J (to 2 sig. fig.)
= 46 kJ
= m c ΔT
= (0.5 kg) × (4200 J/kg °C) × (22 °C)
= 46200 J
= 46000 J (to 2 sig. fig.)
= 46 kJ
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