How much heat must be spent to change the temperature of a brick kiln weighing 100 kg from 20 to 320 degrees?

univerkov | May 4, 2021 | education

Problem data: m (mass of a given brick oven) = 100 kg; t0 (initial temperature) = 20 ºС; t (final furnace temperature) = 320 ºС.

Reference values: according to the condition CK (specific heat of the brick from which the furnace is made) = 750 J / (kg * K).

The heat consumption for heating a given furnace is determined by the formula: Q = Cк * m * (t – t0).

Calculation: Q = 750 * 100 * (320 – 20) = 22.5 * 10 ^ 6 J (22.5 MJ).

Answer: It is necessary to spend 22.5 MJ of heat.

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