Brass weighing 2 kg 844 grams is heated from 14 to 164 degrees. how many kilojoules it will take.
| March 31, 2021 | education
Initial data: m (mass of brass) = 2 kg 844 g = 2.844 kg; t0 (initial temperature of brass) = 14 ºС; t (final heating temperature of brass) = 164 ºС.
Constants: C (specific heat capacity of brass) = 400 J / (kg * K).
The amount of heat that is needed to heat the brass to a given temperature is calculated using the formula:
Q = C * m * (t – t0) = 400 * 2.844 * (164 – 14) = 170640 J = 170.64 kJ.
Answer: To heat brass to 164 ºС, 170.64 kJ of heat is required.
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