A 7710-Kg Copper Bar Is Put into a Smelter for Melting

question 41

Multiple Choice

A 771.0-kg copper bar is put into a smelter for melting.The initial temperature of the copper is 300.0 K.How much heat must the smelter produce to completely melt the copper bar? The specific heat for copper is 386 J/kg ∙ K,the heat of fusion for copper is 205,000 J/kg,and its melting point is 1357 K.

• A)4.73 × 10⁵ _kJ
• B)3.15 × 10¹¹ _kJ
• C)3.15 × 10⁸ _kJ
• D)5.62 × 10⁵ _kJ

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