Thursday, August 18, 2011

CHEMISTRY QUESTION PLEASE HELPPP!!!?

Ethanol, C2H5OH, melts at -114�C and boils at 78�C. The enthalpy of fusion of ethanol is 5.02 kJ/mol, and its enthalpy of vaporization is 38.56 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g�K and 2.3 J/g�K, respectively. How much heat is required to convert 63.0 g of ethanol at -139�C to the vapor phase at 78�C?

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