Question

The heat of fusion of copper is 205000 J/kg. What is the mass of a copper rod that takes 4950000000 J of energy to melt the rod. Be sure to put the correct unit at the end of your answer and also for your final answer, place your final numbers two places after the decimal and round.​

Answer 1

m = 24146.34 kg

Step-by-step 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:

`H = (Q)/(m)\\\\m = (Q)/(H)`

where,

m = mass of copper = ?

Q = Heat absorbed by rod = 4950000000 J

H = Heat of fusion of copper = 205000 J/kg

Therefore,

`m = (4950000000\ J)/(205000\ J/kg)`

m = 24146.34 kg