Photon336
  • Photon336
A graduate student adds 100J of energy to a sample of ethanol at a temperature below the boiling point. The addition of energy causes no change in temperature. What explains this observation. A more energy necessary to change temp B the sample is at the melting point C the bond energies are all greater than 100 J so the bonds could be broken. D the energy dissipates as friction.
Chemistry
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Photon336
  • Photon336
I feel like it's between A/D
taramgrant0543664
  • taramgrant0543664
I'm thinking this one could be A
taramgrant0543664
  • taramgrant0543664
C doesn't make sense as it says bonds are broken normally when the bond breaks energy is released in the form of heat so it should change the temperature

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

Photon336
  • Photon336
Sample is at it's melting point? that doesn't even apply because ethanol is a liquid at RT.
taramgrant0543664
  • taramgrant0543664
Why are you thinking D?
Photon336
  • Photon336
no... wait... it's below the boiling point. maybe that energy was not enough to cause a change in temperature... yeah.. friction? maybe don't know considering collisions aren't elastic some of that energy would be lost to friction. wasn't sure.. I think A makes more sense.
Photon336
  • Photon336
but if D.. were the case that would always be the case..
taramgrant0543664
  • taramgrant0543664
Friction normally causes some sort of heat to form thus changing the temperature doesn't it
Photon336
  • Photon336
explain that? energy is lost to friction so wouldn't that not raise the temperature by that much?
Rushwr
  • Rushwr
Is it A?
Rushwr
  • Rushwr
The question itself says the answer right?
Photon336
  • Photon336
tara
taramgrant0543664
  • taramgrant0543664
Normally when it hits the boiling point it's changing phases so then it would require a change in temperature but in order for it to change phases you need the energy to overcome the forces involved so if it didn't have enough energy the temperature wouldn't have changed
Photon336
  • Photon336
... it's B..
Photon336
  • Photon336
let me write the explanation
Photon336
  • Photon336
"the only time you add energy to a sample and have the temperature remain constant is when there is a phase change. the problem states that ethanol is at a temperature below its boiling point, the only other phase transition would be melting"
Photon336
  • Photon336
to me this was a bad way of testing this concept.. because first of all ethanol is a liquid at room temperature.. and it's at a temperature below the boiling point. okay yeah like I knew that phase transitions were an (equlibirum process) where the temperature remains relatively constant.
Photon336
  • Photon336
but the way they asked it was just dumb to me...
taramgrant0543664
  • taramgrant0543664
It doesn't say specifically at room temperature so that's why it wouldn't nessicarilly be a liquid and this question definitely could have been asked better
Photon336
  • Photon336
yeah.. true.. I guess i shouldn't have assumed that.. but to me this is stupid because melting implies that it's a solid.. I guess we were supposed to assume that..
Photon336
  • Photon336
I will post more.
taramgrant0543664
  • taramgrant0543664
I like how we are told in classes to make assumptions so we automatically get trained to assume parts of questions and that ruins it in some questions

Looking for something else?

Not the answer you are looking for? Search for more explanations.