A pot containing 1.02 liter of water,initially at 18°C, is placed on a1030 W ele

Question

A pot containing 1.02 liter of water,initially at 18°C, is placed on a1030 W electric heating element. (a) How much heat must be supplied to the waterto bring it to a boil?
___________ cal

(b) How much heat is necessary to boil all the water away?
___________ cal

What is the minimum time required to boil all the water away?
____________ min (a) How much heat must be supplied to the waterto bring it to a boil?
___________ cal

(b) How much heat is necessary to boil all the water away?
___________ cal

What is the minimum time required to boil all the water away?
____________ min

Explanation / Answer

Volume of water V = 1.02lit = 1.02 * 10 ^ -3 m ^ 3

Mass of water M = Density * V

                           = 10^ 3 kg / m^ 3 * V

                           = 1.02 kg = 1020 g

Initial temp t= 18 oC

Boiling temp t ‘ = 100 oC

Power of heater P = 1030 W

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