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

question 3

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 $386 \mathrm {~J} / \mathrm { kg } \cdot \mathrm { K }$ the heat of fusion for copper is 205,000 J/kg, and its melting point is 1357 K.

• A) \(4.73 \times 10 ^ { 5 } \mathrm {~kJ}\)
• B) \(3.15 \times 10 ^ { 8 } \mathrm {~kJ}\)
• C) \(3.15 \times 10 ^ { 11 } \mathrm {~kJ}\)
• D) \(5.62 \times 10 ^ { 5 } \mathrm {~kJ}\)

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