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How many grams of water at 17oC must be added to 42g of ice at...

Physics
JAMB 1998
How many grams of water at 17oC must be added to 42g of ice at 0oC to melt the ice completely? [specific latent heat of fusion of ice = 3.4 x 105Jkg-1, specific heat capacity of water = 4200Jkg-1k-1]
  • A. 200g
  • B. 300g
  • C. 320g
  • D. 400g
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Correct Answer: Option A
Explanation
Heat lost = Heat gained

mc\(\theta\) = mL

m x 4200 x 17 = 42 x 3.4 x 105

therefore, m = 200g
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