A steel billet of 2000 kg mass is to be cooled from 1250 K to 450 K. The heat released during this process is to be used as a source of energy. The ambient temperature is 303 K and the specific heat of steel is 0.5 kJ/kg.K the available energy of this billet is A. 490.44 MJ B. 30.95 MJ C. 10.35 MJ
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