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KonstantinChe [14]
4 years ago
6

what quantity of heat will be needed to melt 3kg of ice at -2 degree Celsius to 10 degree Celsius given that S.H.C of water is 4

200j/kg.k.Specific latent heat of fusion is 3.36 times 10 raised to the power 5j/k.SLC is 2100j/kg​
Physics
1 answer:
bekas [8.4K]4 years ago
5 0

Answer:

1.15×10⁶ J

Explanation:

Heat needed to bring the ice to 0°C:

q = mCΔT

q = (3 kg) (2100 J/kg/K) (0°C − (-2°C))

q = 12,600 J

Heat needed to melt the ice:

q = mL

q = (3 kg) (3.36×10⁵ J/kg)

q = 1,008,000 J

Heat needed to bring the water to 10°C:

q = mCΔT

q = (3 kg) (4200 J/kg/K) (10°C − 0°C)

q = 126,000 J

The total heat is:

q = 12,600 J + 1,008,000 J + 126,000 J

q = 1,146,600 J

q = 1.15×10⁶ J

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