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PHYSICS

JAMB 2020 - Question 24

Physics 2020 JAMB Past Questions - Question 24: calculate the mass of ice that would melt when 2 kg of copper is quickly transferred from boiling water to a block of ice without heat loss

Choose the correct answers from the options given.

calculate the mass of ice that would melt when 2 kg of copper is quickly transferred from boiling water to a block of ice without heat loss

A: 8/33kg

B: 33/80kg

C: 80/33kg

D: 33/8kg

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Correct Answer

Explanation

Heat given off by the copper = MCt
= 2 x 400 x (100 - 0)
Heat absorbed by the ice = ML
= M x 3.3 x 10^5
Heat lost = Heat gained
∴ M x 3.3 x 105 = 2 x 400 x 100
∴ M = (2 x 400 x 100)/3.3 x 10^5
= 8/33Kg