Two vessels of the same mass 0.4 kg, one of aluminium ( s = 900 J k g − 1 K − 1 ) and one of copper ( s = 390 ), each hold 1 kg of water at 2 0 ∘ C and are heated until the water reaches 10 0 ∘ C. How

Question

Two vessels of the same mass 0.4 kg, one of aluminium ( s = 900 J k g − 1 K − 1 ) and one of copper ( s = 390 ), each hold 1 kg of water at 2 0 ∘ C and are heated until the water reaches 10 0 ∘ C. How much more heat in kJ goes to warm the aluminium vessel than the copper one (two decimals)?

TestHub · Accepted Answer

The vessel is heated through the same 80 K. Q = m s Δ T : aluminium 0.4 × 900 × 80 = 28800 J, copper 0.4 × 390 × 80 = 12480 J. Difference = 16.32 kJ. A vessel with low specific heat wastes less heat.

Physics - Heat & Thermo Question with Solution | TestHub

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