Question

The vapour pressure of solid benzene is 2.24 mm at 243 K and 24.5 mm at 373 K. Calculate from these data the heat of fusion of benzene.​

Answer 1

Answer:

Given p

o

=200mmHg

p=195mmHg

w= weight of solute = 2g

W= weight of solvent = 78 g

M= Molecular weight ofsolvent (benzene)=78

m= Molecular weight solute = ?

p

o

p

o

−p

=

W×m

w×M

or

200

200−195

=

78×m

2×78

or

200

5

=

m

2

∴m=80

Explanation:

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