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What is the minimum amount of energy required to completely melt a 7.25-kg lead brick which has a starting temperature of 18.0 °C? The melting point of lead is 328 °C. The specific heat capacity of lead is 128 J/(kg∙C°); and its latent heat of fusion is 23,200 J/kg. 1.68 × 105 J 2.88 × 105 J 4.56 × 105 J 5.96 × 105 J 7.44 × 105 J
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