What amount of heat is required to heat a steel cutter weighing 400 g, if during quenching
| March 18, 2021 | education
What amount of heat is required to heat a steel cutter weighing 400 g, if during quenching it was heated from a temperature of 20C to a temperature of 1320C.
Task data: m (weight of the steel cutter taken) = 400 g (in SI m = 0.4 kg); t0 (initial temperature of the cutter) = 20 ºС; t (quenching temperature) = 1320 ºС.
Reference values: Cc (specific heat capacity of steel) = 500 J / (kg * K).
The required heat for hardening the taken steel cutter is determined by the formula: Q = Cc * m * (t – t0).
Calculation: Q = 500 * 0.4 * (1320 – 20) = 260 * 103 J = 260 kJ.
Answer: 260 kJ of heat was expended to harden the steel cutter taken.
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