vera_ewing
  • vera_ewing
Chem
Chemistry
schrodinger
  • schrodinger
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vera_ewing
  • vera_ewing
vera_ewing
  • vera_ewing
taramgrant0543664
  • taramgrant0543664
I know at stp the most ideal would be O2 and the C2H4 but I'm not for sure when pressure is high

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vera_ewing
  • vera_ewing
Would the answer be D. C?
JoannaBlackwelder
  • JoannaBlackwelder
Have you studies van der waals equation and constants?
vera_ewing
  • vera_ewing
Yeah a little bit.
JoannaBlackwelder
  • JoannaBlackwelder
Do you see a trend in the constants of these substances?
vera_ewing
  • vera_ewing
Yes.
JoannaBlackwelder
  • JoannaBlackwelder
What trend do you see and what do you think it means?
vera_ewing
  • vera_ewing
The bonds are decreasing from A to B? So I think that D. C would have ideal behavior at high pressures.
JoannaBlackwelder
  • JoannaBlackwelder
What do you mean that the bonds are decreasing?
vera_ewing
  • vera_ewing
A has more bonds than B, C, and D.
JoannaBlackwelder
  • JoannaBlackwelder
That is true. Are you saying that oxygen gas will be most ideal at high pressures?
vera_ewing
  • vera_ewing
Well I think Ne would have ideal behavior at high pressures. Or O-O. Am I correct?
JoannaBlackwelder
  • JoannaBlackwelder
Yes, I get one of those. Do you have the van der waals constants for each?
vera_ewing
  • vera_ewing
No. But I think it's O-O, not Ne.
JoannaBlackwelder
  • JoannaBlackwelder
http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch4/deviation5.html Why do you think it is O-O?
vera_ewing
  • vera_ewing
I think because it has one bond...
JoannaBlackwelder
  • JoannaBlackwelder
Why does that make it more ideal at high pressures do you think?
vera_ewing
  • vera_ewing
Maybe because the one bond makes it more stable and it's between O and O?
JoannaBlackwelder
  • JoannaBlackwelder
Hm, let's look at the constants for O2 and Ne and see if we can draw any conclusions.
JoannaBlackwelder
  • JoannaBlackwelder
What values of constants do you think would make the van der waals equation simplify down to the ideal gas law?
vera_ewing
  • vera_ewing
I'm not really sure...
JoannaBlackwelder
  • JoannaBlackwelder
If the an^2/V^2 term went to 0, what do you think would happen to van der waals?
vera_ewing
  • vera_ewing
I'm not sure. Can you please explain?
JoannaBlackwelder
  • JoannaBlackwelder
If that term went to zero, then van der waals would simplify to|dw:1438902988176:dw|
vera_ewing
  • vera_ewing
Okay
JoannaBlackwelder
  • JoannaBlackwelder
And what if the nb term went to 0?
vera_ewing
  • vera_ewing
Um idk... /:
JoannaBlackwelder
  • JoannaBlackwelder
Take a guess.|dw:1438903094158:dw|
vera_ewing
  • vera_ewing
Just RT?
JoannaBlackwelder
  • JoannaBlackwelder
No, only the nb term would go to zero.|dw:1438903183657:dw|
vera_ewing
  • vera_ewing
Ohh okay! So it's Ne?
JoannaBlackwelder
  • JoannaBlackwelder
Right, because the van der waals constants are closer to 0.
vera_ewing
  • vera_ewing
Ah, okay! Thank you so much for explaining it!
JoannaBlackwelder
  • JoannaBlackwelder
You're welcome :-)

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