How much energy in kilojoules is released when 23.3 g of ethanol vapor at 84.0 °C is cooled to -17.0 °C ? Ethanol has mp = -114.1 °C, bp = 78.3 °C, AHvap = 38.56 kJ/mol, and AHusion = 4.93 kJ/mol. The molar heat capacity is 112.3 J/(K· mol) for the liquid and 65.6 J/(K· mol) for the vapor. Express your answer in kilojoules to three significant figures. ? kJ

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How much energy in kilojoules is released when 23.3 g of ethanol vapor at 84.0 °C is cooled to -17.0 ° C ? Ethanol has mp = –
bp = 78.3 °C, AHvap = 38.56 kJ/mol, and AHfusion
J/(K· mol) for the vapor.
-114.1 °C,
4.93 kJ/mol. The molar heat capacity is 112.3 J/(K. mol) for the liquid and 65.6
Express your answer in kilojoules to three significant figures.
?
q =
kJ
Transcribed Image Text:How much energy in kilojoules is released when 23.3 g of ethanol vapor at 84.0 °C is cooled to -17.0 ° C ? Ethanol has mp = – bp = 78.3 °C, AHvap = 38.56 kJ/mol, and AHfusion J/(K· mol) for the vapor. -114.1 °C, 4.93 kJ/mol. The molar heat capacity is 112.3 J/(K. mol) for the liquid and 65.6 Express your answer in kilojoules to three significant figures. ? q = kJ
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