What is the specific heat capacity of a substance if an amount of heat of 1 kJ is needed to heat 1 kg
| July 7, 2021 | education
What is the specific heat capacity of a substance if an amount of heat of 1 kJ is needed to heat 1 kg of this substance by 2 degrees?
Initial data: m (mass of unknown substance) = 1 kg; Δt (change in temperature of the substance) = 2 ºС; Q (required amount of heat) = 1 kJ (1000 J).
We express the specific heat of an unknown substance from the formula: Q = C * m * Δt, whence C = Q / (m * Δt).
Calculation: C = 1000 / (1 * 2) = 500 J / (kg * ºС).
Answer: An unknown substance has a specific heat capacity of 500 J / (kg * ºС).
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