What mass of white cast iron would crystallize if 70 MJ of energy were released; specific

What mass of white cast iron would crystallize if 70 MJ of energy were released; specific heat of solidification of white cast iron is 140KJ / kg.

Initial data: Q (heat released during crystallization of white cast iron) = 70 MJ = 70 * 10 ^ 6 J.

Constants: λ (specific heat of solidification of white cast iron) = 140 kJ / (kg * K) = 140 * 10 ^ 3 J / (kg * K).

We calculate the mass of white cast iron that crystallized from the following formula:

Q = λ * m and m = Q / λ.

Let’s do the calculation:

m = (70 * 10 ^ 6) / (140 * 10 ^ 3) = 500 kg.

Answer: Under the given conditions, 500 kg of white cast iron can crystallize.