
a)
Interpretation:
The enthalpy of vaporization of Octane has to be calculated.
Concept Introduction:
The Trouton’s rule for non-bonding Hydrogen solutes states that the heat of vaporization is directly proportional to the boiling temperature.
The enthalpy of vaporization can be calculated as,
To calculate the enthalpy of vaporization of Octane
a)

Answer to Problem 24.19P
The enthalpy of vaporization of Octane is
Explanation of Solution
Given,
Boiling point of Octane =
Boiling point =
Boiling point =
The enthalpy of vaporization of Octane is calculated as,
The enthalpy of vaporization of Octane =
b)
Interpretation:
The vapour pressure of Octane has to be calculated.
Concept Introduction:
The vapour pressure of compound can be related to heat of vaporization
Here,
To calculate the vapour pressure of Octane
b)

Answer to Problem 24.19P
The vapour pressure of Octane is
Explanation of Solution
Given,
The vapour pressure of Octane =
c)
Interpretation:
The vapour pressure of Hexane has to be calculated.
Concept Introduction:
The vapour pressure of compound can be related to heat of vaporization
Here,
To calculate the vapour pressure of Hexane
c)

Answer to Problem 24.19P
The vapour pressure of Hexane is
Explanation of Solution
The vapour pressure of Hexane =
d)
Interpretation:
The relationship between vapour pressure of solute and retention has to be given.
To give the relationship between vapour pressure of solute and retention
d)

Explanation of Solution
The vapour pressure of solute and the retention are inversely proportional to each other.
If the vapour pressure would be lower, then the retention would be greater.
e)
Interpretation:
The reason has to be explained for the name of technique as “gas chromatography” if the analytes retained are partially vaporized.
To explain why the technique is called as “gas chromatography” if the analytes retained are partially vaporized
e)

Explanation of Solution
When the analytes retained are partially vaporized, the technique is called as gas chromatography since the mobile phase would be gaseous in form.
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Chapter 24 Solutions
Quantitative Chemical Analysis 9e And Sapling Advanced Single Course For Analytical Chemistry (access Card)
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