As always, for all the numerical questions, be accurate to 4 significant digits.

Question

As always, for all the numerical questions, be accurate to 4 significant digits.

You and your friend went to kitchen to boil water. You poured 300 gram of water to a container, and put the container on a 300 W electric heater. Your friend wanted more boiling water, so he poured 600 gram of water to another container and put the container on another heater with the same power. You and your friend turned on the heaters at the same time. While you were waiting for the water to boil, both of you got distracted and forgot about the heaters and left the heaters on for 25 minutes. Assume that all the heat from the heater is used to heat the water, and that the vaporized water is removed from the container. The specific heat of water is 4.19 J/g

Explanation / Answer

(300*25*60-80*300*4.19)/2260

=154.6194

300-154.6194 = 145.3805g

b)600 - (300*25*60-80*600*4.19)/2260

=489.8761 g

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