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

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