If 1 kg of water is mixed with 1 kg of sugar, what is the expected change in boi

₹0.0

Question: If 1 kg of water is mixed with 1 kg of sugar, what is the expected change in boiling point? (2023)

Options:

Correct Answer: Increase

Exam Year: 2023

Solution:

The addition of sugar (a non-volatile solute) will raise the boiling point of water due to boiling point elevation.

If 1 kg of water is mixed with 1 kg of sugar, what is the expected change in boiling point? (2023)

If 1 kg of water is mixed with 1 kg of sugar, what is the expected change in boiling point? (2023)

Step 1: Understand that boiling point elevation occurs when a non-volatile solute (like sugar) is added to a solvent (like water).
Step 2: Recognize that the boiling point of pure water is 100 degrees Celsius at standard atmospheric pressure.
Step 3: Know that adding sugar to water will increase the boiling point of the mixture.
Step 4: Use the formula for boiling point elevation, which is ΔT = i * Kb * m, where ΔT is the change in boiling point, i is the van 't Hoff factor (which is 1 for sugar), Kb is the ebullioscopic constant for water, and m is the molality of the solution.
Step 5: Calculate the molality of the sugar solution by determining the number of moles of sugar in 1 kg of sugar and dividing by the mass of water in kg.
Step 6: Apply the values into the boiling point elevation formula to find the expected change in boiling point.

Boiling Point Elevation – The phenomenon where the boiling point of a solvent increases when a non-volatile solute is added.
Colligative Properties – Properties that depend on the number of solute particles in a solution, not the identity of the solute.