Chemistry Practice Problems Entropy Practice Problems Solution: The normal boiling point of ethanol (C2H5OH) is 78...

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Solution: The normal boiling point of ethanol (C2H5OH) is 78.3 ° C and its molar enthalpy of vaporization it 38.56 kJ/mol. What is the change in entropy of the system in J/K when 77.2 grams of ethanol at 1 atm condenses to a liquid at the normal boiling point?a) 825b) -825c) -263d) -184e) 263

Problem

The normal boiling point of ethanol (C2H5OH) is 78.3 ° C and its molar enthalpy of vaporization it 38.56 kJ/mol. What is the change in entropy of the system in J/K when 77.2 grams of ethanol at 1 atm condenses to a liquid at the normal boiling point?

a) 825
b) -825
c) -263
d) -184
e) 263



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