how many kilojoules of energy are necessary to raise the temperature of 3 kilograms of cast iron from 30 degrees Celsius to 120
degrees Celsius?
1 answer:
Specific heat of cast iron is 0.46 kJ / kg K.
Energy change = 0.46 kJ / kg K * 3 kg * (120 - 30) K = 124.2 kJ
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