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Question: A copper block of mass 2 kg is heated to a temperature of 500<sup>0</sup>C and then placed in a larg...

A copper block of mass 2 kg is heated to a temperature of 5000C and then placed in a large block of ice at 00C. What is the maximum amount of ice that can melt ? The specific heat of copper is 400 J kg–10C–1 and latent heat of fusion of ice is

3.5 × 105 J kg–1 :

A

43\frac{4}{3}kg

B

65\frac{6}{5}kg

C

87\frac{8}{7}kg

D

109\frac{10}{9}kg

Answer

87\frac{8}{7}kg

Explanation

Solution

2 × 400 × 500 = m × 3.5 × 105

4 = m × 3.36 ̃ m = 43.56\frac{4}{3.56}kg = 4035\frac{40}{35} = 87\frac{8}{7}kg