Phase Changes (Section)Ethanol (C2H50H) melts at-114 °C
Chapter , Problem 45E(choose chapter or problem)
Problem 45E
Phase Changes (Section)
Ethanol (C2H50H) 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 and 2.3 J/g-K. respectively
(a) How much heat is required to convert 42.0 g of ethanol at 35 °C to the vapor phase at 78°C?
(b) How much heat is required to convert the same amount of ethanol at-155 °C to the vapor phase at 78°C?
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