How much heat will be released during crystallization and cooling to 39 degrees C, 50 kg of iron
| February 26, 2021 | education
How much heat will be released during crystallization and cooling to 39 degrees C, 50 kg of iron taken at the melting temperature.
Data: tк (final temperature of iron cooling) = 39 ºС; m (iron mass) = 50 kg; iron was at the melting temperature (tm = 1539 ºС).
Reference data: λ (specific heat of fusion of iron) = 2.7 * 10 ^ 5 J / kg; C (specific heat) = 460 J / (kg * K).
The amount of heat released during crystallization and cooling of iron is determined by the formula: Q = λ * m + C * m * (tmelt – tc).
Calculation: Q = 2.7 * 10 ^ 5 * 50 + 460 * 50 * (1539 – 39) = 48 * 10 ^ 6 J (48 MJ).
Answer: 48 MJ of heat will be released.
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