A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following (Fig. 1) would correctly represent the result? Justify your choice.
A
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B
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C
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D
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Solution
The correct option is D
The latent heat of fusion or melting of solid is the quantity of heat in joules required to convert1 kg of solid to liquid without any change in temperature.
Explanation for correct option
Initially when heat is provided temperature of the content of beaker does not rise suddenly it will rise after some time, because of latent heat of fusion. When all ice melts and, the temperature of content starts rising.
Explanation for the incorrect options
Clearly option A is incorrect as temperature can't be constant after some time.
Option B is incorrect as on providing heat temperature rises gradually not suddenly.
Option C is incorrect because with time temperature will not decrease it will rise.
