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What requires the most energy? a Freezing 0.5 kg of ice b Raising the temperature by 1 degree for 1 kg of ice c Melting

What requires the most energy? a Freezing 0.5 kg of ice b Raising the temperature by 1 degree for 1 kg of ice c Melting 1 kg of ice d Raising the temperature by 1 degree of 5 kg of ice

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