Physics
2.25kg of ice, initially at −40
∘C, is heated using a 3.2kW heater without loss to the surroundings. How much more time elapses before the water reaches boiling point? Give your answer in seconds.
∘C, is heated using a 3.2kW heater without loss to the surroundings. How much more time elapses before the water reaches boiling point? Give your answer in seconds.
Original post by Roxibox123
2.25kg of ice, initially at −40
∘C, is heated using a 3.2kW heater without loss to the surroundings. How much more time elapses before the water reaches boiling point? Give your answer in seconds.
∘C, is heated using a 3.2kW heater without loss to the surroundings. How much more time elapses before the water reaches boiling point? Give your answer in seconds.
If you still need help, below are some guides.
First, compute the amount of energy that the ice needs to increase the temperature from ‒40 °C to 100 °C and we call this Q.
Spoiler
We know that energy supplied by the heater equals the energy gained by the ice, from this we can find the time elapsed.
Spoiler
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