# Chemistry

What colligative properties are displayed by these situations.
1. Antifreeze is added to car cooling system preventing freezing when air temp is below 0 degrees C.
2. Ice melts on sidewalk after salt has been spread

1. Both are freezing point depression.

posted by DrBob222
2. Thanks!
So the antifreeze one doesn't have anything to do with vapor pressure?

posted by Kathleen
3. Ethylene glycol is permanent antifreeze that is added to cars these days. That lowers the freezing point and raises the boiling point AND most cars these days operate with the radiator under pressur which raises the boiling point even higher. The engine is a little more efficient at the higher temperature.

posted by DrBob222
4. THANKS!

posted by Kathleen
5. U shouldn't cheet on Chems

posted by Mike hunt
6. Mike hunt- It's been 7 years lol

posted by Angie

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