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The enthalpy of vaporisation of liquid d...

The enthalpy of vaporisation of liquid diethly ether `-(C_2H_5)_2O,` is `26.0kJmol(-1)` at its boiling point `(35.0^@C)`. Calculate `DeltaS` for conversion of : (a) liquid to vapour, and (b) vapour to liquid at `35^@C`.

Text Solution

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(i) `Deltaunderset(vap)(S)=(Deltaunderset(vap)(S))/(T)=(26xx10^(3))/(308)=84.41JK^(-1)mol^(-1)`
(ii) `Deltaunderset("cond")(S)=(Deltaunderset("cond")(H))/(T)=(-26xx10^(3))/(308)=-84.41JK^(-1)mol^(-1)`
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