A Petroleum Company Separates Benzene (78 G/mol) and N-Octane (114

question 97

Multiple Choice

A petroleum company separates benzene (78 g/mol) and n-octane (114 g/mol) by distillation. In one run, the starting solution was 15% benzene and 85% n-octane by mass at 25C. In the liquid, the mole ratio of benzene to n-octane was ________, and in the vapor it was ________. The vapor pressures for benzene and n-octane at this temperature are 11 torr and 95 torr, respectively.

• A)0.26; 0.12
• B)0.18; 0.12
• C)0.80; 0.20
• D)0.26; 0.18
• E)0.31; 0.23

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