Answer:
Correct answer: c = 520 J/kg °K
Explanation:
The formula for calculating the amount of heat delivered to a given substance is:
Q = m · c · ΔT
the temperature difference is the same on the Kelvin scale and the Celsius scale
ΔT = Δt = 320 °K - 315 °K = 47 C° - 42 C° = 5 °K
c = Q / (m · ΔT) = 5,200 J / (2 kg · 5 °K) = 5,200 J / 10 kg °K = 520 J/kg °K
c = 520 J/kg °K
an unknown substance conducts heat well and could be metal
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