What amount of heat is needed to heat 2 kg of aluminum from 20 to 70 degrees?
| June 25, 2021 | education
Given: m (mass of aluminum to be heated) = 2 kg; t0 (temperature before heating) = 20 ºС; t (required temperature) = 70 ºС.
Constants: Ca (specific heat capacity of aluminum) = 920 J / (kg * ºС).
To determine the heat expended for heating 2 kg of aluminum, we will use the formula: Q = Ca * m * (t – t0).
Calculation: Q = 920 * 2 * (70 – 20) = 920 * 2 * 50 = 92 * 10 ^ 3 J (92 kJ).
Answer: D) 92 kJ of heat is needed to heat 2 kg of aluminum.
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