How much heat must be added to a 3 kg block of ice at − 2 2 ∘ C to change it to water at 1 8 ∘ C ? Take specific heat of ice = 0.5 cal/g ∘ C , specific heat of water = 1 cal/g ∘ C , latent heat of fus

Question

How much heat must be added to a 3 kg block of ice at − 2 2 ∘ C to change it to water at 1 8 ∘ C ? Take specific heat of ice = 0.5 cal/g ∘ C , specific heat of water = 1 cal/g ∘ C , latent heat of fusion = 80 cal/g .

TestHub · Accepted Answer

Heat for three stages per kg: warm ice to 0 ∘ C , melt, warm water to 1 8 ∘ C . Δ Q = 3 [ 0.5 × ( 0 − ( − 22 )) + 80 + 1 × ( 18 − 0 ) ] Δ Q = 3 × 109 kcal Δ Q = 327 kcal

Physics - Heat & Thermo Question with Solution | TestHub

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