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A substance has a melting point of 20℃ and a heat of fusion of 3.5 × 104 J/kg. The boiling point is 150℃ and the heat of vaporization is 7.0 × 104 J/kg at a pressure of 1.0 atm. The specific heats for the solid, liquid, and gaseous phases are 600 J/(kg⋅K), 1000 J/(kg⋅K), and 400 J/(kg⋅K), respectively. The quantity of heat given up by 0.50 kg of the substance when it is cooled from 170℃ to 88℃, at a pressure of 1.0 atmosphere, is closest to

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