Calculate the mass if it took 8MJ of energy to heat up to 200C? Substance aluminum

univerkov | August 17, 2021 | education

These tasks: Δt (change in temperature of the taken aluminum) = 200 ºС; Q (thermal energy required for heating aluminum) = 8 MJ (8 * 10 ^ 6 J).

Reference values: Ca (specific heat capacity of aluminum) = 920 J / (kg * K).

We express the mass of heated aluminum from the formula: Q = Ca * m * Δt, whence m = Q / (Ca * Δt).

Let’s calculate: m = 8 * 10 ^ 6 / (920 * 200) = 43.48 kg.

Answer: 43.48 kg of aluminum was heated at 200 ºС.

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