A. 2.66 x 10^8 J
Explanation:
We are given the heat of fusion of iron to be [tex]2.66 \times 10^5[/tex] and it it in [tex]J/kg[/tex] so in order to find the amount of heat given off, we multiply the Heat of Fusion by the number of kilograms of Iron(1000 kg).
Solving:
[tex]Q = \text{Mass} \times \text{Heat of fusion}\\Q = 1000 \, \text{kg} \times 2.66 \times 10^5 \, \text{J/kg}\\\boxed{Q = 2.66 \times 10^8 \, \text{J}}[/tex]
Therefore, A is the correct answer!
