College Chemistry Quiz
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THERMOCHEMISTRY (CALORIMETRY & HESS'S LAW)
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A sample of benzene undergoes the following temperature changes when heated at a constant rate: solid benzene from 0°C to 5.5°C (melting point), melting at 5.5°C, liquid benzene from 5.5°C to 80.1°C (boiling point), and boiling at 80.1°C. If the enthalpy of fusion is 127 J/g and the enthalpy of vaporization is 394 J/g, which phase change requires more energy for a 100 g sample?
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