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anonymous

  • one year ago

Which liquid would be a better coolant for a car engine, water or ethyl alcohol? Explain briefly. (HINT: A good coolant could absorb lots of heat and not go up very much in temperature. What relates ability to absorb heat with temperature?)

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  1. Jhannybean
    • one year ago
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    Compare the heat capacity for both ethyl alcohol and water?

  2. Jhannybean
    • one year ago
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    Think about how long it takes water to heat up.

  3. anonymous
    • one year ago
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    okay so would that be 0.59 for ethyl alcohol and 1.00 for water? I'm not sure which one is the answer. I think ethyl alcohol but I could be completely wrong!

  4. anonymous
    • one year ago
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    @Jhannybean what do you think?

  5. Jhannybean
    • one year ago
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    They give you a pretty big hint right here: `A good coolant could absorb lots of heat and not go up very much in temperature`

  6. Jhannybean
    • one year ago
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    Between water and ethyl alcohol, which one does that?

  7. Jhannybean
    • one year ago
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    Also im not sure where you got the 0.59 and 1.00 from.

  8. Photon336
    • one year ago
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    The hydrogen bonding in water makes it a better coolant if i'm not mistaken

  9. Jhannybean
    • one year ago
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    That's what I was getting at without giving a direct answer, but yes, you are right.

  10. Photon336
    • one year ago
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    Well they both can H bond

  11. anonymous
    • one year ago
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    The thing is that I don't know anything about ethyl alcohol except that number 0.59, which is the specific heat (cal/g Celsius). Is that not what I'm supposed to be looking at cause that's what my lesson is about! And from my reading I know water can absorb a lot of heat and not go up in temperature. I guess water is the right answer? Idk haha

  12. Photon336
    • one year ago
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    But water has a greater extent of H bonding

  13. Photon336
    • one year ago
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    @greeneyes<3 specific heat depends on the molecules inter molecular forces as well

  14. Photon336
    • one year ago
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    the stronger the molecules inter molecular forces, the more heat you need to raise the temperature by a certain amount

  15. Photon336
    • one year ago
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    |dw:1441766381117:dw| There is a lone pair of electrons on the hydrogen that acts as an electron donor in H bonding and a hydrogen that acts as an H bond acceptor.

  16. Photon336
    • one year ago
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    |dw:1441766457943:dw| my diagrams are pretty crappy but The idea is that when the degree of hydrogen bonding is greater you're going to have to put more energy into the liquid to get it to boil. if you look up hydrogen bonding diagrams, these are a great way to see why.

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