Answer:
m = 24146.34 kg
Explanation:
The heat of fusion is defined as the amount of heat required to melt a unit mass of a substance completely. Hence, it can be calculated by the following formula:
[tex]H = \frac{Q}{m}\\\\m = \frac{Q}{H}[/tex]
where,
m = mass of copper = ?
Q = Heat absorbed by rod = 4950000000 J
H = Heat of fusion of copper = 205000 J/kg
Therefore,
[tex]m = \frac{4950000000\ J}{205000\ J/kg}[/tex]
m = 24146.34 kg