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You need about 290.3 kj of heat to melt one quart of ice at 0oC.

Water's latent heat of fusion is 333.7 kj/kg.

1 quart ≈ 0.946 lt. Density of ice is 0.920 kg/lt. So mass of ice (considering the quart of ice is one solid piece, not broken ice) is 0.946(0.920) kg ≈ 0.870 kg.

Heat required to melt the ice: 0.870 kg (333.7 kj/kg) ≈ 290.3 kj.

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Q: How much heat is required to melt a quart of ice resting at 0 degrees Celsius?
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