Question #106080
Calculate the entropy change, for the vaporization of ethyl alcohol, C2H5OH at its boiling point 78.3 ˚C
(heat of vaporization of ethyl alcohol is 39.3 Kj/mol)
1
Expert's answer
2020-03-23T10:14:16-0400

Since vaporization at boiling point is an equilibrium process, the entropy change ΔS\Delta S can be calculated by equation

ΔS=ΔH/T\Delta S=\Delta H/T

where ΔH\Delta H is heat of vaporization and T is boiling temperature in Kelvins.

Thus, the entropy change is

ΔS=39300/(78.3+273.15)=\Delta S=39300/(78.3+273.15)= 111.82 J/(K*mole)


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