The freezing point of the solution is heat loss during the given process is
Further explanation:
Freezing point:
It is defined as the temperature where both the solid and liquid phases are in equilibrium with each other. Here the vapor pressure of the substance in the liquid state becomes equal to the vapor pressure in a solid state.
The formula to calculate the change in freezing point is,
...... (1)
Here,
is the change in freezing point.
is the freezing point depression constant.
m is the molality of the solution.
Molality is one of the concentration terms that is equal to the amount of solute divided by the mass of the solvent. It is represented by m and its unit is mol/kg.
The formula to calculate the molarity of the solution is,
……. (2)
The formula to calculate the moles of biphenyl is,
…… (3)
The given mass of biphenyl is 0.925 g.
The molar mass of biphenyl is 154.21 g/mol.
Substitute these values in equation (3).
The moles of biphenyl is 0.0059 mol.
The mass of cyclohexane is 25 g.
Substitute these values in equation (2).
The molarity is 0.236 m.
The value of is .
Substitute these values in equation (1).
The formula to determine the change in freezing point is as follows:
...... (4)
Here,
is the temperature of the solvent.
is the temperature of the solution.
Rearrange equation (4) to calculate the temperature of the solution.
……. (5)
Substitute for and for in equation (5).
Learn more:
1. What is the equilibrium constant of pure water at ? brainly.com/question/3467841
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Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Colligative properties
Keywords: freezing point, temperature of solution, temperature of solvent, 1.78, molarity, biphenyl, cyclohexane, 0.236 m, m, mol/kg, solid, liquid.