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How much energy in kilojoules is released when 28.9g of ethanol (C 2 H 6 O) vapor at 92 o C is cooled to -19.0
How much energy in kilojoules is released when 28.9g of ethanol (C2H6O) vapor at 92oC is cooled to -19.0oC?
Ethanol has: melting point = -114.1oC, boiling point = 78.3oC enthalpy of vaporization (delta Hvap) = 38.56 kJ/mol enthalpy of fusion (delta Hfus) = 4.93kJ/mol The molar heat capacity is 112.3J/(Kmol) for the liquid The molar heat capacity is 65.6 J/(Kmol) for the vapor.
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