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Why is it advised to add ethylene glycol...

Why is it advised to add ethylene glycol to water in a car radiator while driving in a hill station.

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Aqueous solutions which do not freeze at `0^(@) C ` are called antifreeze solutions. When a non-valatile solute (like ethylene glycol) is added to water, it decreases its freezing point. Such solutions freeze at a temperature below `0^(@) C ` As we know water is used in radiators of vehicles for cooling . However , if the vehicle is to be used at high altitude where the temperature often falls below zero, water would freeze . To avoid this difficulty antifreeze solutions are used as coolant in radiators of cards and buses.
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Properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get a homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to-day life One of its examples is the use of ethylene glycol and water mixture as an anti-freezing liquid in the radiator of automobiles.A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9.Given: Freezing point depression constant of water (Kfwater​)=1.86Kkgmol−1Freezing point depression constant of ethanol(Kfethanol​)=2.0Kkgmol−1 Boiling point elevation constant of water(Kbwater​)=0.52Kkgmol−1 Boiling point elevation constant of ethanol (Kbethanol​)=1.2Kkgmol−1 Standard freezing point of water =273K Standard freezing point of ethanol =155.7K Standard boiling point of water =373K Standard boiling point of ethanol =351.5K Vapour pressure of pure water =32.8mmHg Vapour pressure of pure ethanol =40mmHg Molecular weight of water =18gmol−1 Molecular weight of ethanol =46gmol−1 In answering the following questions, consider the solutions to be ideal dilute solutions and solutes to be non-volatile and non-dissociative. Water is added to the solution M such that the mole faraction of water in the solution becomes 0.9. the boiling point of this solution is

In cold concentries, a solution of water and ethylene glycol is used as coolant in an automobile engine radiator instead of water. Explain

STATEMENT - 1 : addition of ethylene glycol to water lowers the freezing point of water, therefore, used as antifreeze substance. STATEMENT - 2 : Ethylene glycol is soluble in water.

The temperature of a city was found to be -9.3^(@) C. A car used, whose rasiator was filled with 5 L of water . What minimum quantity of antifreezing agent ethylene glycol were added to water of raiator in order to use the car for teavelling? ( K_(f) of water 1.86 k mol^(-1))

BETTER CHOICE PUBLICATION-SOLUTIONS-Question Bank (2 .6 Colligative Properties And Determination of Molar Mass)
  1. Explain depression in freezing point. How depression in freezing poi...

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  2. Define molar depression constant

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  3. How will you show that depression in freezing point is a colligative p...

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  4. How will you show that depression in freezing point is a colligative p...

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  5. The boiling point increases and freezing point decreases when sodium ...

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  6. Sodium chloride solution freezes at lower temparature than water but b...

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  7. Out of 1 M urea and 1M KCl solution, which has higher freezing point?

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  8. What are antifreeze solutions ?

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  9. In cold concentries, a solution of water and ethylene glycol is use...

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  10. Why is it advised to add ethylene glycol to water in a car radiator wh...

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  11. What is de-icing agent ? How does it function ?

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  12. Define osmosis. What is the difference between osmosis and diffusion...

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  13. What is Osmotic pressure?

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  14. Why determination of osmotic pressure is preffered for finding molecul...

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  15. Show that osmotic pressure is a colligative property?

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  16. What is a semi-permeable membrane ?

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  17. What are isotonic,hypertonic and hypotonic solutions.

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  18. Derive the relationship to find the condition for isotonic solutions.

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  19. STATEMENT - 1 : When dried fruits and vegetables are placed in water, ...

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  20. A poled egg when dipped in water swells while is saturated brine solut...

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