<p>When temperature increases, energy of a gas increases. So energy is definitely a function of temperature. Same thing for the ideal behavior of a gas; as temperature increases, a gas becomes more and more ideal. The correct answer for this question is density because it says the VOLUME is constant, and since density is mass/volume, density is constant and not affected by change in temperature</p>
<p>@jamesyu92, you have bad memory.</p>
<p>The phosphorous in the second part of the reaction had P4, not P2.</p>
<p>EDIT: Nevermind, I may be wrong about this one, but I do remember some molecule having P4 on BOTH sides of the reaction. I also remember putting 8O2 as one of my answers, so I guess I got that right. :p</p>
<p>@jamesyu92</p>
<p>[Density</a> of Gases](<a href=“http://www.elmhurst.edu/~chm/vchembook/123Adensitygas.html]Density”>Virtual ChemBook)</p>
<p>No, I was right, I win!
"Gas Density examples based upon differences in temperature.</p>
<p>The density of gases depends upon the temperature. The higher the temperature, the more the molecules are spread out and the lower the density as shown in the graphic on the left. The result is that warm gases rise and cool gases sink. The same concept helps to explain the weather resulting in high and low pressures. High pressure means high density, cooler, sinking air. Low pressure means low density, warmer, rising air. "</p>
<p>Note that it is under a constant volume.</p>
<p>More to support: <a href=“http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/kintem.html[/url]”>http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/kintem.html</a></p>
<p>“But this most probable distribution (the Maxwell-Boltzmann distribution) is subject to constraints, namely that the number of particles is constant and that the total energy is constant (conservation of energy)”</p>
<p>So I guess the total energy was not a function of temperature (average kinetic energy is, but total is not), unless someone can disprove of this.</p>
<p>Is the answer 0.5 mol for the reaction 2 C + O2 –> CO2 (unbalanced) but something like that</p>
<p>and 56 g for zinc metal?</p>
<p>I am 100% sure that the reaction is correct because I happened to be using my admission ticket to balance that equation 
(i am not supposed to but oh wells)</p>
<p>@LancelotduLac
Kudos to you for actually going through the thread to check answers instead of making people the same things over and over again I give you cookies with M&Ms sprinkled on top</p>
<p>LDF is the only intermolecular force mentioned and I do believe that its the reason for the liquidification or whatever the heck they called it.</p>
<p>Density is the only property unaffected because it equals mass/volume. Mass is unaffected by temperature and the volume is constant, so density would thus be the same at all temperatures given that the volume doesn’t change. </p>
<p>Why everything else is wrong:
Pressure: Directly related to temperature…as temperature increases, so does pressure.
Deviation: Increase in temperature…what do you expect (it is also related to van der Waals equation, but I’m not going to bother delving into it)?
Total energy of gas: Energy of gas increases with increased application of energy.</p>
<p>was the increase in entropy letter E i think liquid to liquid and gas</p>
<p>Yes, it was the only equation that had a net increase in gas molecules for choice E for the entropy question.</p>
<p>.250 mol at the end?</p>
<p>God I thought NaAt would be the answer, because the huge At molecules would lower the vapor pressure…</p>
<p>Oh well. :)</p>
<p>I can’t believe, you guys haven’t discussed the organic chemistry one on the T/F section. </p>
<p>Isomer? Why? I thought I knew but I’m not sure. Plus I forgot what I put. But was it an isomer? I think it was, but I forgot if the CH2 changes into a CH3…so I’m not sure.</p>
<p>@chewydog: actually, I think you maybe right. I guess it’s -4 wrong now = 80/85. ****, I’m on the borderline for an 800! Actually, I may have lost it already since I noticed this test was easier than practice ones.</p>
<p>Giancolii, that one was pretty easy. It was TTCE. I counted the carbons and hydrogens and C4H10=C4H10 of the other structure. The explanation was correct because isomers have the same formulas but dif. structures.</p>
<p>@Giancolii: Uh…okay. Isomers are compounds that have the same chemical formula but different structures. So that question was TTCE. If you had added all of the carbons and hydrogens up, I believe you ended up with C4H10 for both.</p>
<p>@LancelotduLac: I’m sorry TT_TT</p>
<p>Yeah I think I put TT CE. Well overall, it was okay but I need to pace myself. I had to guess on the last few. Didn’t feel like omitting.</p>
<p>Aghhh.</p>
<p>I thought for that one question with the temperature that there was an option for velocity? I put that temperature does not affect velocity -___-</p>
<p>btw i think i’ve missed 3 already and skipped 2. are my hopes of an 800 crushed?</p>
<p>^ You mean volume?</p>
<p>so far i think i have 4 omitted and maybe up to 5 wrong? what would that be</p>
<p>For all of you looking for the elusive 800 (including me), google informs me that we should probably expect about a ~79 and above to be an 800. It goes downhill from there (though not terribly steeply).</p>
<p>Edit
I just found THIS…from CB’s released test
85 - 800
84 - 800
83 - 800
82 - 800
81 - 790
80 - 790
79 - 780
78 - 780
77 - 770
76 - 770
75 - 760
74 - 760
73 - 750
72 - 750
71 - 740
70 - 740
69 - 730
68 - 730
67 - 720
66 - 720
65 - 710
64 - 710
63 - 710
62 - 700
61 - 700
60 - 690 </p>
<p>You. Are. Welcome. Feed me food now. :)</p>
<p>I’m pretty sure it said velocity…and I reasoned that KE depends on temperature but velocity of particles depends on the molar masses of the particles?</p>