URGENT
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Answer:
The mass of the given gold bar:<u> m = 1.8 × 10² g</u>
Explanation:
The Specific heat capacity (c) of a given substance is defined as the heat capacity (C) per unit mass (m) or the energy required (Q) to increase the temperature (ΔT) of the given substance per unit mass.
∴ <u>The specific heat capacity</u>:
Given: The specific heat capacity of gold (Au) = 0.128 J/g°C
The increase in temperature: ΔT = 34.7°C - 30.0°C = 4.7°C
Heat energy: Q = 0.108 kJ = 0.108 × 1000 J = 108 J (∵ 1 kJ = 1000J)
Mass of the given gold bar: m = ?
<u>Therefore, the mass of the given gold bar</u>:
<u>Therefore, the mass of the given gold bar: m = 1.8 × 10² g</u>