
Interpretation:
The freezing point of the solution, formed by condensing given volume of a gas into
Concept introduction:
The ideal gas equation is given as follows:
Here,
The temperature at which change of liquid state to solid state occurs is called freezing point.
The freezing point depression is as follows:
Here,
For benzene
The actual freezing point is the difference between freezing point of pure solvent and freezing point depression.
Convert
Thus, conversion factor will be
Convert
Thus, the correct conversion factor will be

Answer to Problem 65QP
Solution:
Explanation of Solution
Given information: Volume of a gas is
Pressure is
Absolute Temperature is
Mass of benzene is
The conversion factor for
Multiply the conversion factor with the given quantity, canceling units to get the desired quantity. Hence,
One degree Celsius
Convert the temperature
Substitute
The ideal gas equation is expressed as follows:
Rearrange the above expression for the calculation of n (number of moles) as follows:
Substitute
The mass of benzene (solvent) is
The conversion factor for
Multiply the conversion factor with the given quantity and cancelling units to get the desired quantity. Hence,
The molality is calculated as follows:
Substitute
The freezing point depression is calculated as follows:
Substitute
The freezing point of the solution is calculated as follows:
Substitute
The freezing point of the solution is
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Chapter 13 Solutions
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