A slab of stone of area 0.5 m 2 and thickness 8 cm has steam at 10 0 ∘ C on its lower face and ice at 0 ∘ C on its upper face. In one hour 2.5 kg of ice melts. Heat loss from the sides is negligible a

Question

A slab of stone of area 0.5 m 2 and thickness 8 cm has steam at 10 0 ∘ C on its lower face and ice at 0 ∘ C on its upper face. In one hour 2.5 kg of ice melts. Heat loss from the sides is negligible and L = 3.34 × 1 0 5 J k g − 1 . Find the conductivity of the stone in W m − 1 K − 1 (two decimals).

TestHub · Accepted Answer

Q = m L = 2.5 × 3.34 × 1 0 5 = 8.35 × 1 0 5 J. K = A Δ T t Q d ​ = 0.5 × 100 × 3600 8.35 × 1 0 5 × 0.08 ​ = 0.37 W m − 1 K − 1 .

Physics - Heat & Thermo Question with Solution | TestHub

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