Ethylene glycol is mixed with water in automobile radiators as antifreeze because:
Correct answer: D. All of the above
- A. It increases the boiling point of radiator coolant
- B. It is non-volatile in character
- C. Has low vapour pressure as compared to water
- D. All of the above
Explanation
This is the correct answer. Let's explore why each reason contributes:Increases boiling point: Ethylene glycol has a higher boiling point (approximately 197°C) compared to water (100°C). When mixed with water, it raises the boiling point of the coolant mixture, preventing the coolant from boiling in the engine even at high operating temperatures. This helps prevent overheating and potential engine damage.Non-volatile: Ethylene glycol, compared to water, has a much lower vapor pressure. This means it evaporates less readily at a given temperature. This helps to maintain the coolant level in the radiator throughout its operation, preventing frequent top-ups.Low vapor pressure: As mentioned above, the low vapor pressure of ethylene glycol minimizes its evaporation and contributes to maintaining a stable coolant level. This is crucial, as a lower coolant volume can lead to inadequate heat transfer and engine overheating.
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About Fundamental Principles of Organic Chemistry
Organic chemistry begins with carbon compounds classified by carbon skeleton, saturation and functional group. Work includes identifying groups such as hydroxyl, carbonyl, carboxyl and amino, applying basic nomenclature, and distinguishing structural, geometric and optical isomers, where the same molecular formula does not necessarily mean the same structure or properties.
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