Answer:
550 J
Step-by-step explanation:
The formula for the amount of heat (q) released by the copper is
q = mCΔT
Data:
n = 0.762 mol
C = 0.386 J°C⁻¹g⁻¹
T_i = 81.6 °C
T_f = 52.2 °C
Calculations:
(a) Mass of copper
\text{Mass} = \text{0.762 mol} \times \dfrac{\text{63.55 g}}{\text{1 mol}} = \text{48.43 g}
(b) ΔT
ΔT = 81.6 °C - 52.2 °C = 29.4 °C
(c) q
q = mCΔT = 48.43 g × 0.386 J·°C⁻¹g⁻¹ × 29.4 °C = 550 J
The amount of heat released by the copper is 550 J.