Concept explainers
A student dissolves
Aniline is used in the polyurethane manufacturing process.
Materials made from polyurethane include foams (as pictured), spandex, hardwood floor coatings, dolly wheels, and many other end products.
Interpretation:
The freezing and boiling temperature of solution on dissolving aniline in water is to be stated.
Concept introduction:
Freezing temperature of any liquid is the temperature at which vapor pressure of solid becomes equal to the vapor pressure of liquid. Addition of a solute into any other solution decreases the freezing point of solution. Boiling point is the temperature at which vapor pressure of liquid is equal to atmospheric pressure.
Answer to Problem 119E
Freezing temperature when aniline is dissolved in
Boiling temperature of solution when aniline is dissolved in
Explanation of Solution
The equation used to calculate freezing temperature of the solution is stated below.
Where,
•
•
•
•
•
The formula used to calculate the molality is stated below.
The given value of mass of aniline is
The molar mass of aniline is
The given mass of water is
Substitute the value of mass of aniline, mass of water and molar mass of aniline in equation (3) as shown below.
Calculation of freezing temperature is shown below.
The given value of
Substitute the value of
Given value of
Substitute the value of
Therefore, the
Therefore, freezing temperature of the solution is
The equation used to calculate boiling temperature of the solution is stated below.
Where,
•
•
•
•
•
Calculation of boiling temperature is shown below.
The given value of
Calculated value of
Substitute the value of
Given value of
Substitute the value of
Therefore, the
Therefore, boiling temperature of the solution is
Freezing and boiling temperature of the solution is
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Chapter 16 Solutions
Introductory Chemistry: An Active Learning Approach
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