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
Correct Answer: Option B
Explanation
Q = mL + mcθ = 1 x 3.5 x 10 5 + 1 x 2.1 x 10 3 x 30
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