Initial data: m (mass of iron to be converted into liquid) = 100 kg.
Reference data: according to the condition λ (specific heat of fusion of iron) = 2.7 * 10 ^ 5 J / kg.
The thermal energy, which is necessary for the transformation of iron into liquid, is determined by the formula: Q = λ * m.
Let’s perform the calculation: Q = 2.7 * 10 ^ 5 * 100 = 2.7 * 10 ^ 7 J.
Answer: To convert 100 kg of iron into a liquid, 2.7 * 10 ^ 7 J of energy is needed.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.