Heat is supplied to a test tube containing 100g of ice at its melting point....

JAMB 1994

Heat is supplied to a test tube containing 100g of ice at its melting point. The ice melts completely in 1 min.What is the power rating of the source of heat? [Latent heat of fusion of ice = 336Jg^-1]

A. 336W
B. 450W
C. 560W
D. 600W

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Correct Answer: Option C

Explanation

p x t = heat energy

P x 1 x 60 = 100 x 336

p = 560W

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Heat is supplied to a test tube containing 100g of ice at its melting point....

Correct Answer: Option C

Explanation

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