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Q.

The boiling point of chloroform, CHCl3, is 61.7∘C and its enthalpy of vaporization is  31.4 kJ-mol −1 Calculate the molar entropy of vaporization for chloroform :

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a

509J×mol−1⋅K−1

b

10.7J×mol−1⋅K−1

c

93.8J×mol−1⋅K−1

d

301J×mol−1⋅K−1

answer is B.

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Detailed Solution

Change in entropy for this case,

ΔS=31.4×103334.7=93.8Jmol−1K−1

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