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The quantity of heat energy required to melt completely 1 kg of ice at -...

Physics
JAMB 2012
The quantity of heat energy required to melt completely 1 kg of ice at - 30oC is
[latent heat of fusion = 3.5 x 10 5Jkg -1, specific heat capacity of ice = 2.1x10 3Jkg -1K -1]
  • A. 4.13x10 6J
  • B. 4.13x10 5J
  • C. 3.56x10 4J
  • D. 3.56x10 2J
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Correct Answer: Option B
Explanation
Q = mL + mcθ = 1 x 3.5 x 10 5 + 1 x 2.1 x 10 3 x 30

There is an explanation video available below.

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Explanation Video

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