SOLUTION: A total of 0.8 kg of water at 20 deg. C is placed in 1 kW electric kettle. How long a time is needed to raise the temperature of water to 100 deg. C

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Question 950011: A total of 0.8 kg of water at 20 deg. C is placed in 1 kW electric kettle. How long a time is needed to raise the temperature of water to 100 deg. C
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The heat capacity of water is 4.18 J/(gK).
Q=mC%5Bp%5D%2A%28T%5Bf%5D-T%5B0%5D%29
Q=%28800%29%284.18%29%28100-20%29J
Q=267520J
Assuming 100% efficiency,
1 W =1 J%2Fs
1 kW=1000J%2Fs
.
.
t=267520%2F%281000%29
t=267.52s