(a)
Interpretation:
The compound(A,B or C) which has weakest forces between molecules should be identified from the given vapor pressure curves of the molecule.
Concept introduction:
The vapor pressure curveis the curve of temperature and vapor pressure of compound. The compound which vaporizes easily has weakest force of attraction.
(b)
Interpretation:
The compound (A, B, and C) which has a normal boiling point at about 150C should be identified from the given vapor pressure curves of the molecule.
Concept introduction:
The way to find out normal boiling point is drawing of horizontal line from left at the standard pressure.
(c)
Interpretation:
The temperature at which B will boil if the atmospheric pressure is 500 mm Hg should be determined from the given vapor pressure curves of the molecule.
Concept introduction:
The intersection point of curve B and horizontal line is the temperature at which B boils.
(d)
Interpretation:
The physical state of A at 250C and 400 mm Hg should be identified from the given vapor pressure curves of the molecule.
Concept introduction:
The intersection point of 250C and 400 mm Hg is right of curve of A. Any point on the right of curve A is gas.
(e)
Interpretation:
The pressure at which C will boil at 400C should be determined from the given vapor pressure curves of the molecule.
Concept introduction:
The intersection point of curve C at 400C with horizontal line indicates the pressure.

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Chapter 9 Solutions
PRINCIPLES+REACTIONS
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