Find the mass (in g) of a copper calorimeter if its temperature rises by 45° when it absorbs 3.6 kJ of heat. The specific heat capacity of copper is 0.4 Jg⁻¹K⁻¹.
200
Heat absorbed Q = m × c × ΔT, so m = Q ÷ (c × ΔT).
Q = 3.6 kJ = 3600 J, c = 0.4 J/g/K, ΔT = 45 K
m = 3600 ÷ (0.4 × 45) = 3600 ÷ 18
= 200 g
Check: 200 × 0.4 × 45 = 3600 J.
Hence, 200.
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