Short Answer
A substance has a melting point of +25.0°C, an enthalpy of fusion of 1200 J g 1, and specific heats for the solid and the liquid are 3.00 and 6.20 J g-1 °C -1, respectively. How much energy is needed to change 150 grams of the substance from a solid at -40.0°C to a liquid at +70.0°C?
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2.51 × 105 ...View Answer
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