anonymous
  • anonymous
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?)
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Jhannybean
  • Jhannybean
Compare the heat capacity for both ethyl alcohol and water?
Jhannybean
  • Jhannybean
Think about how long it takes water to heat up.
anonymous
  • anonymous
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!

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anonymous
  • anonymous
@Jhannybean what do you think?
Jhannybean
  • Jhannybean
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`
Jhannybean
  • Jhannybean
Between water and ethyl alcohol, which one does that?
Jhannybean
  • Jhannybean
Also im not sure where you got the 0.59 and 1.00 from.
Photon336
  • Photon336
The hydrogen bonding in water makes it a better coolant if i'm not mistaken
Jhannybean
  • Jhannybean
That's what I was getting at without giving a direct answer, but yes, you are right.
Photon336
  • Photon336
Well they both can H bond
anonymous
  • anonymous
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
Photon336
  • Photon336
But water has a greater extent of H bonding
Photon336
  • Photon336
@greeneyes<3 specific heat depends on the molecules inter molecular forces as well
Photon336
  • Photon336
the stronger the molecules inter molecular forces, the more heat you need to raise the temperature by a certain amount
Photon336
  • Photon336
|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.
Photon336
  • Photon336
|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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