The heating element of a coffeemaker operates at 120 V and carries a current of
ID: 1407638 • Letter: T
Question
The heating element of a coffeemaker operates at 120 V and carries a current of 2.50 A. Assuming the water absorbs all of the energy converted by the resistor, calculate how long it takes to heat 0.590 kg of water from room temperature (23.0°C) to the boiling point. The heating element of a coffeemaker operates at 120 V and carries a current of 2.50 A. Assuming the water absorbs all of the energy converted by the resistor, calculate how long it takes to heat 0.590 kg of water from room temperature (23.0°C) to the boiling point. The heating element of a coffeemaker operates at 120 V and carries a current of 2.50 A. Assuming the water absorbs all of the energy converted by the resistor, calculate how long it takes to heat 0.590 kg of water from room temperature (23.0°C) to the boiling point.Explanation / Answer
amount of heat reqiured = Q = m*c*dt = 0.59*4190*(100-23)
Q = 190351.7 J
power of the heating element P = v*I = 120*2.5 = 300 W
time taken = t = Q/P = 190351.7/300 = 634.51 s <<<<-------answer
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