An immersion heater is rated 1500W. How long does it take the heater to raise the temperature of 1 kg of water by 30°C? (Assume heat lost to the surrounding is negligible, Specific heat capacity of water 4200Jkg^-1K^-1)

Chukecious

4 years ago

IVt = MCƯ
Power(P) = IV
Pt = MCƯ
1500×t = 1×4200×30
1500t = 126000
t = 126000÷1500
t = 84s
Correct answer is A

Temmyshinersnation

9 months ago

I will say this wrong.Cause the temperature is supposed to be in "KELVIN" not "CELCIUS"
I stand to be corrected.