Q.

Calculate the mole fractions of each component in vapour phase.

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a

yCH2Cl2=0.285 yCHCl3=0.715

b

yCH2Cl2=0.18 yCHCl3=0.82

c

yCH2Cl2=0.82 yCHCl3=0.18

d

yCH2Cl2=62.4 yCHCl3=0.376

answer is C.

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Detailed Solution

Using the relation y1=p1ptotal ,we can calculate the mole P total fractions of the components in the gas phase yi.                 pCH2Cl2=0.688×415mmHg=285.5mmHgpCHCl3=0.312×200mmHg=62.4mmHgyCH2Cl2=285.5mmHg/347.9mmHg=0.82yCHCl3=62.4mmHg/347.9mmHg=0.18
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