When will more energy be released when 2 kg of aluminum or 6 kg of iron are cured?

1) Energy for solidification of aluminum:
Q1 = λ1 * m1, where λ1 – beats. heat of fusion (table value λ1 = 3.9 * 10 ^ 5 J / (kg * K), m1 is the mass of aluminum (m1 = 2 kg).
Q1 = 3.9 * 10 ^ 5 * 2 = 7.8 * 10 ^ 5 J.
2) Energy for iron solidification:
Q2 = λ2 * m2, where λ2 – beats. heat of fusion (table value λ2 = 2.7 * 10 ^ 5 J / (kg * K), m2 is the mass of iron (m2 = 6 kg).
Q2 = 2.7 * 10 ^ 5 * 6 = 16.2 * 10 ^ 5 J.
3) 7.8 * 10 ^ 5 J <16.2 * 10 ^ 5 J and Q1 <Q2, more energy will be released when 6 kg of iron solidifies.