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Chemistry

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errrka
Posts: 2261 - Karma: 6,058

help please.
how do i even start to do this?

At STP, which of the following gases shows the greatest deviation from ideal behavior? Give two reasons for your choice.    CCL4, SO2, Br2, CO2


any help would be lovely. thanks

Oct 7 2008 3:03PM
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user098123
Posts: 6072 - Karma: 18
You could try this:

http://wiki.answers.com/Q/What_is_deviation_from_ideal_behavior_of_gases

I'm kinda curious about the CCl4 though because that is a pretty large molecule and may deviate from the ideal behavior a little more.
Oct 7 2008 3:18PM
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moonofendor
Posts: 1484 - Karma: 14
SO2 because theres gonna be two electrons chillin around the sulfur. all the other ones fill the octet rule. reminds me of ap chem last year.

Oct 7 2008 3:31PM
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errrka
Posts: 2261 - Karma: 6,058
haha yeah i'm in ap chem
and failing....
Oct 7 2008 3:39PM
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user098123
Posts: 6072 - Karma: 18
i don't think it's just because the sulfur has a free electron pair. Br2 has 3 free electron pairs on each bromine and CO2 has 2 free electron pairs on the oxygens.

It has to do more with the fact that SO2 has a specific geometry (not linear like CO2) as well as the fact that it is a large molecule which goes against ideal gas laws. Additionally, SO2 has a resonance which affects its geometry and stability which would effect its ideal behavior.
Oct 7 2008 3:43PM
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JockinJLoads
Posts: 3480 - Karma: 6
dont give up on chem, gen chem sucks a fat one, but orgo is actually interesting and fun (still hard tho)
Oct 7 2008 3:44PM
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user098123
Posts: 6072 - Karma: 18
Ya I liked orgo alot. I'm a chem major though so I better like chem.

And then I got to p.chem this year. Oh my god worst fucking class ever. I didn't have the time to put into it so I dropped it and I'm going to retake it next year. It's a nightmare.
Oct 7 2008 3:46PM
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moonofendor
Posts: 1484 - Karma: 14
yeah i remember something like that. that and Br2 would be linear no matter what.


oh and def don't drop ap chem, it gets so much easier after thermo (prolly like chapter5-7 if i remember correctly.) then its just like chillin in class learnin all these weird rules that happen. and the test itself was easy as shit. just know solubility rules, and stochiometry*
Oct 7 2008 3:50PM
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freezed
Posts: 12973 - Karma: 500
best thing to do for this problem is look at the assumptions you make when you call something an ideal gas, then look at each molecule and if/how it violates those assumptions.
Oct 7 2008 3:56PM
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49566738265
Posts: 0 - Karma: 7,704
That is why, and that is correct.
Oct 7 2008 4:14PM
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no_steeze
Posts: 23992 - Karma: 4,273
god i fucking hate chem, there's no pattern for understanding whatsoever, it's complicated annoying memorization and shitty problem sets that take forever and never give you a decent understanding. so far this year i've understood nothing except the scientific method, something i learned in 5th grade
i hate polyatomic ions
Oct 7 2008 4:16PM
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user098123
Posts: 6072 - Karma: 18
how is there no pattern? That's all chemistry is... it just follows a couple different laws and rules. I didn't really understand chem too well when I first started taking it, but if you really put in the time to understand it will all click together and be really easy.
Oct 7 2008 4:26PM
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no_steeze
Posts: 23992 - Karma: 4,273
apparently my teacher sucks then, he keeps telling us with the stuff we're doing now it's just memorization
Oct 7 2008 5:50PM
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errrka
Posts: 2261 - Karma: 6,058
you guys were right, haha i felt smart when he said that was the answer, i was like yay, one right!  but the reasoning was that the other 3 molecules were nonpolar, and the SO2 was a polar molecule.

but yeah, its just theres soo much unfamiliar memorization. In anatomy I can at least relate to some terms with my own body, but chemistry is such an unimaginable territory, at least to me. I'm sitting here still up struggling on yet another chem paper, I'm thinking of just going in super early tomorrow to get once again, more help
Oct 9 2008 12:40AM
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Scott~
Posts: 2551 - Karma: 49
Chemistry is for the win.  Actually I hated it in high school, but now its awesome~
Oct 9 2008 12:45AM
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KravtZ
Posts: 6637 - Karma: 2,629
holy fuck i hate chem worst subject ever completly useless unless ur gunna be a chemist or something like that i hate everything about it worst subject ever
Oct 9 2008 12:46AM
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freezed
Posts: 12973 - Karma: 500
chemistry is actually not just a lot of memorization. learn the patterns and rationales, and you don't have to worry about memorizing specific things. really.

although, along the way, you may accidentally memorize a lot of stuff.
Oct 9 2008 12:47AM
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jack_weisman
Posts: 2310 - Karma: 169
ok think about the ideal gas law

- ideal gas law - no intermolecular interactions, volume is negligible.

so which of the compounds would have the strongest attractions i.e hydrogen bonds polar and non-polar. And which have the larger molecular weight.

ohhhhh AP chem.
Oct 9 2008 1:00AM
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SHastatahoe
Posts: 3414 - Karma: 20
Next semester is my last semester and I will have a minor in chemistry.  I don't know how to answer your question. 
Oct 9 2008 1:54AM
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Scott~
Posts: 2551 - Karma: 49
Organic Chemistry is for sure memorization lol~
Oct 9 2008 3:44AM
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Skibumsmith
Posts: 5432 - Karma: 11,823
That's some advanced shit. I'm in honors 11 grade chem and the book is like "A proton is..."
Oct 9 2008 4:30AM
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errrka
Posts: 2261 - Karma: 6,058
haha i wish. and my teacher is like half retarded too. he looks at a problem and goes yeah thats impossible next problem? or he'll do an entire stiochemetry problem that took like 10 minutes all on the board and go, yeah i did that wrong, erase it and then do it again. then tests us on all the stuff he never taught us. it blows

Oct 9 2008 9:24AM
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user098123
Posts: 6072 - Karma: 18
it may seem like it, but it's really not. The patterns are just much much harder to find and learn haha. What Organic chem did you take? Was it mechanism based? The one they teach here at michigan state for chem and p.chem majors is only mechanisms, and if you learn how to do mechanisms then it makes A LOT more sense.
Oct 9 2008 10:04AM
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freezed
Posts: 12973 - Karma: 500
not really. i mean, you do have to remember reagents and whatnot (for synthesis questions), but the majority of it is reasoning through...is this going to undergo E2 or SN2, is it going to form cis or trans, should I use OsO4, O3, or mCPBA to make this alkene do what I want?
Oct 9 2008 1:18PM
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An10a_Eng
Posts: 2505 - Karma: 26

octet rule

Oct 9 2008 3:16PM
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errrka
Posts: 2261 - Karma: 6,058
coming back to haunt me
due tomorrow is naming and writing formulas for complex ions
like one is...
trans-dichlorobis(ethlenediamine)colbalt(III) chloride
i mean really?
im thinking its      trans-[Cl3(en)Co2]2 [Cl]

thats a total educated guess. any help? i dont know gah
Oct 16 2008 3:34PM
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