Take two paper cups and pour about 50ml water in one of the cup. Heat both of them.
a) Write your observation.
b) Ramesh and Suresh heated water in a beaker. Ramesh kept the beaker near the wick in
the yellow part of the candle flame. Suresh kept the beaker in the outer most part of the
flame whose water will get heated in shorter time. Why
Answers
Answer:
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a) You will observe the one without water to start burning rapidly and the water will start boiling in the one with water. When the candle have transferred approximately 20,5 kJ of energy to the water (if we assume that the water is at 4 °C) it will reach 100 °C and then after the candle transferring additionally 113,000 kJ of energy to the water, all the water will have vaporized into steam and the paper mug will catch fire.
(b) Ramesh and Suresh were doing an experiment in which water was to be heated in a beaker. Ramesh kept the beaker near the wick in the yellow part of the candle flame. Suresh kept the beaker in the outermost part of the flame.
Water in Ramesh's beaker will heat faster. In a candle flame, outer most zone is the hottest part (blue part) and inner most zone (yellow part) is the coldest part.