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Boiling Point Elevation and Freezing Point Depression Video Lecture | Chemistry for JEE Main & Advanced
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FAQs on Boiling Point Elevation and Freezing Point Depression Video Lecture - Chemistry for JEE Main & Advanced
| 1. What is boiling point elevation and freezing point depression? |  |
Ans. Boiling point elevation and freezing point depression are colligative properties of a solution. Boiling point elevation refers to the increase in the boiling point of a solvent when a non-volatile solute is added to it. Freezing point depression, on the other hand, is the decrease in the freezing point of a solvent when a solute is added.
| 2. What causes boiling point elevation and freezing point depression? | |
Ans. Boiling point elevation occurs because the presence of a solute in the solvent lowers the vapor pressure of the solvent. As a result, the boiling point of the solution increases compared to the pure solvent. Similarly, freezing point depression occurs because the solute disrupts the formation of crystal lattice in the solvent, making it more difficult for the solvent to freeze at the same temperature.
| 3. How can boiling point elevation and freezing point depression be calculated? | |
Ans. Boiling point elevation and freezing point depression can be calculated using the formulas:
For boiling point elevation: ΔTb = Kb * m * i
where ΔTb is the boiling point elevation, Kb is the molal boiling point elevation constant, m is the molality of the solute, and i is the van't Hoff factor.
For freezing point depression: ΔTf = Kf * m * i
where ΔTf is the freezing point depression, Kf is the molal freezing point depression constant, m is the molality of the solute, and i is the van't Hoff factor.
| 4. What are some real-life applications of boiling point elevation and freezing point depression? | |
Ans. Boiling point elevation and freezing point depression have several practical applications. One common application is the use of antifreeze solutions in car radiators, where the addition of a solute lowers the freezing point of the coolant and prevents the engine from freezing in cold temperatures. Boiling point elevation is also utilized in cooking, where adding salt to water increases its boiling point and helps in faster cooking of food.
| 5. How do boiling point elevation and freezing point depression relate to the JEE exam? | |
Ans. Boiling point elevation and freezing point depression are important topics in the JEE (Joint Entrance Examination) chemistry syllabus. Understanding these concepts is crucial for solving numerical problems related to colligative properties of solutions. Students preparing for the JEE exam should have a clear understanding of how to calculate and apply these phenomena in various scenarios.
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Dec 22, 2024 Last updated |
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