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JEE Main20204 Sep 2020Morning ShiftPhysicsThermal Properties of MatterActual

The specific heat of water = 4200 J kg – 1 K – 1 and the latent heat of ice = 3.4 × 10 5 J k g – 1 . 100 grams of ice at 0 o C is placed in 200 g of water at 25 o C . The amount of ice that will melt as the temperature of water reaches 0 o C is close to (in grams)

Options

  1. A61.7
  2. B63 . 8
  3. C69 . 3
  4. D64 . 6

Correct answer

A. 61.7

Step-by-step solution

MSΔT = M l 200 1000 × 4200 × 25 = m × 340 × 10 3 m = 61 . 7

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