Calculate the entropy change of n-hexane when 1 mole of it evaporates at 341.7 K(∆H_vap = 29.0 kJ mol^–1).

Solution

increment straight S subscript vap space equals space fraction numerator increment straight H subscript vap over denominator straight T subscript straight b end fraction space equals space fraction numerator 29.0 space cross times space 10 cubed space straight J space mol to the power of negative 1 end exponent over denominator 341.7 space straight K end fraction space space space space equals space 84.9 space JK to the power of negative 1 end exponent space mol to the power of negative 1 end exponent

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