Post by: Martoman on July 21, 2010, 06:48:51 pm
I like them. If anyone has these and would be willing to send them it would be fabulous. :smitten:
Obvious preference would be equilibrium/rates of reaction. ::)
Post by: Russ on July 21, 2010, 06:57:54 pm
Post by: Martoman on July 21, 2010, 07:18:39 pm
Post by: kakar0t on July 21, 2010, 07:20:51 pm
Post by: Russ on July 21, 2010, 08:10:31 pm
Post by: Martoman on July 21, 2010, 08:32:43 pm
Post by: Blakhitman on July 22, 2010, 11:09:55 pm
Post by: kakar0t on July 22, 2010, 11:10:55 pm
Post by: Martoman on July 22, 2010, 11:30:21 pm
Post by: Blakhitman on July 23, 2010, 12:09:05 am
http://www.megaupload.com/?d=F31RX3PG
Post by: Martoman on July 23, 2010, 12:26:46 am
You are actually my hero.
Post by: Blakhitman on July 23, 2010, 12:31:14 am
Post by: Martoman on July 23, 2010, 01:11:03 am
Like.... 09!?!?
Post by: Mao on July 23, 2010, 01:45:05 am
Post by: Blakhitman on July 23, 2010, 07:04:05 am
THERE WILL BE A NEXT TIME!?!?!!?!??!
Like.... 09!?!?
haha my statement was kinda more general than that, but I'll see if my teacher has a copy (and will give it to me) today.
PDF'd for the kind gentlemen.
You are just too awesome, hopefully next time, no one else would have to go to the trouble of doing it for me! Thank you
Post by: Whatlol on July 23, 2010, 09:27:57 am
Post by: Russ on July 23, 2010, 09:35:56 am
Post by: Martoman on July 23, 2010, 05:11:48 pm
Post by: Blakhitman on July 23, 2010, 06:23:18 pm
asking for alot i know, but answers? ::)
Sorry, no answers :(
I have an idea :D you scan your solutions up, you can't be wrong :P.
Post by: Martoman on July 23, 2010, 09:41:07 pm
Worked solutions:
1) C
It is moving to the right. The red will decrease. So A,B are wrong. D suggests linearity, something that *wont* happen in real life situations involving such equilibria. Hence C is the required answer.
2) B. Since we are dealing with different states, increasing gas pressure is the least likely to affect this. A increases surface area and hence will increase. All the rest are quite trivial.
3) B. It says *mainly* and whilst A is correct this only accounts for a small increase.
4) D. A supposes you are taking the reverse of one reaction. You aren't. its a hypothetical. B is describing an exothermic. Di is right because if you draw a small graph, the activation energy is always greater than delta H.
5) A. Difference is 60. We have multiplied the equation by 3. So times 60 *3 = 180. It has released heat, so -180.
6) D. Reverse reaction has an activation energy of 40+20+30 = 90. Times this by 2 we get 180.
7) A. simple maths.
8) C. Use whatever means you use. You start with 0.5 mol of NO2 and 0.2 remains. So the change is 0.3. in concentration thats 0.03. 0.03/2 is formed of N2O4. So 0.015. then use K value.
9) D. Just use number of particles. 5 -> 3 this means thatif we increase pressure it will want to decrease it, so it will go to the right. This is what we want.
10) C. Look for an endothermic and one where more particles on the right.
1 a) Yeah........ kinda confused here. The point X from what i can see refers to a specific kinetic energy.
ii) Draw a pretty graph with the *dicky* end more to the right and similar areas underneath.
iii) An increase in temp increases the average kinetic energy of the system. This means that there is a greater proporion of particles with sufficient enregy to overcome the activation complex.
bi) At the beginning of the reaction where the concentrations of both reactants are at their peak.
ii) No more H2 is produced, the reaction has gone to completion.
iii) work out what the effect of using 1g of magnesium will do. To do this look at what the 2g was doing. See what is the limiting reagent.
Mg -> 2/24.3 vs 0.15*2
0.08 vs 0.3
Ratio is 1: 2 so clearly, Mg is limiting.
If we were working with 1 gram of Mg it would also limit, but the value of the mass of H would be lower because we are using less mol of Mg and the Mol of Mg determines the mol and hence the mass of H2.
Graph should have a greater rate than the first due to it being powdered but at t1 taper off arbitrarily lower.
iv) Increase the temperature.
Use a suitable catalyst.
Increase concentration of reactants.
2) column on the left going down is : Left (endo),right,right (less particles),No change (position isn't affected by this).
opposite: Decrease, no change, no change, no change (coz only temperature effects this bad boy)
3) ai) I refuse to answer this question. if you can't do this, GTFO out of chemistry NAO!
ii) 88.1
b) refer to link: http://img718.imageshack.us/f/chemcs.jpg/
ci) +160. It is the back reaction. So the change in H is just the positive of the original enthalpy.
ii) Change in H + activation energy = 160 + 40 = 200kjmol^-1
d) refer to link - http://img94.imageshack.us/f/chem1j.jpg/
Logic for ai in 4.
You start off with intial concentrations. the reactants decrease by x amount. The product increases by same x amount.
Do.not.bag.my.handwriting. :knuppel2: :knuppel2: :knuppel2: :knuppel2: :knuppel2: :knuppel2: :knuppel2:
Not sure on: 3,4,1ai. Correct any of my mistakes :smitten:
Post by: cameron_15 on July 23, 2010, 11:07:02 pm
...It sort of looks like theres half of another line there, that I can't see...
Thanks to Blackhitman for the test! Was good fun to do at 11pm on a Friday night (geez i'm lonely :2funny:)
Post by: Martoman on July 23, 2010, 11:41:08 pm
Post by: 98.40_for_sure on July 23, 2010, 11:48:18 pm
enjoy ;)
Phwoah... ill do this real soon!
EDIT: NICE HANDWRITING LOL
Post by: Martoman on July 23, 2010, 11:52:13 pm
Post by: cameron_15 on July 23, 2010, 11:55:10 pm
Answers my question and answers my questions ;)
Post by: Martoman on July 23, 2010, 11:57:05 pm
Post by: 98.40_for_sure on July 24, 2010, 12:01:42 am
Chemistry: A+ A+ A+ 50
Post by: Martoman on July 24, 2010, 12:08:46 am
seriously. i doubt i got all that right.
Post by: cameron_15 on July 24, 2010, 12:18:55 am
Question 4 I did something...different. I'm going to do it again as I am having trouble following my own work ::)
For some reason I decided it was better that the volume of the vessel was 10L not 4... I'm putting that in the late night/half asleep mistake pile.
Post by: 98.40_for_sure on July 24, 2010, 12:23:44 am
I got D for 4
Post by: Russ on July 24, 2010, 09:43:21 am
1ai is a specific kinetic energy, yeah, but I think they're angling for it to be recognised as barrier for the reaction to take place
Post by: Blakhitman on July 24, 2010, 10:56:18 am
Yeah fairly certain 1ai is the activation energy.
Post by: vexx on July 24, 2010, 11:35:03 am
thanks blakhitman for postinggg and mao for pdfing!
Post by: linahh123 on July 24, 2010, 12:15:41 pm
If somebody gives me instructions i'd be happy to do so.
Post by: Russ on July 24, 2010, 12:29:38 pm
Post by: crayolé on July 24, 2010, 12:38:06 pm
Got home, realised it was the exact same test Blak posted up ==
Post by: Martoman on July 24, 2010, 02:20:56 pm
I did this same test on friday so i have the solutions. I can scan them but i dont know how to upload :-[
If somebody gives me instructions i'd be happy to do so.
Solutions would be fabulous. :D
Post by: InitialDRulz on July 24, 2010, 05:43:03 pm
Thanks for this =)
Post by: kazzam on July 24, 2010, 06:10:16 pm
NEAP 2008 Chemistry tests with answers
-Electrochemistry
-Rate,heat and equilibium reactions
-Energy sources and the energy of chemical reactions
-Equilibrium and industrial production of chemicals
Post by: aznanthony on July 24, 2010, 06:19:20 pm
Thank you for sharing!
Post by: Blakhitman on July 24, 2010, 06:24:15 pm
http://www.megaupload.com/?d=PP7D56SI
NEAP 2008 Chemistry tests with answers
-Electrochemistry
-Rate,heat and equilibium reactions
-Energy sources and the energy of chemical reactions
-Equilibrium and industrial production of chemicals
file is temporarily unavailable :(
Would be awesome if you could reupload!!!! :)
THANK YOU!
Post by: Martoman on July 24, 2010, 06:25:22 pm
http://www.megaupload.com/?d=PP7D56SI
NEAP 2008 Chemistry tests with answers
-Electrochemistry
-Rate,heat and equilibium reactions
-Energy sources and the energy of chemical reactions
-Equilibrium and industrial production of chemicals
I LOVE YOU!
Also i will take off one mark for my saying on 2bii that it has gone to completion. 34/35. sigh. :smitten:
http://www.megaupload.com/?d=PP7D56SI
NEAP 2008 Chemistry tests with answers
-Electrochemistry
-Rate,heat and equilibium reactions
-Energy sources and the energy of chemical reactions
-Equilibrium and industrial production of chemicals
file is temporarily unavailable :(
Would be awesome if you could reupload!!!! :)
THANK YOU!
refresh the page this happened to me.
Post by: superflya on July 24, 2010, 06:27:44 pm
Post by: Whatlol on July 24, 2010, 06:28:30 pm
^^ worked for me :/
took me three tries but i got it :p
Post by: aznanthony on July 24, 2010, 06:30:54 pm
Post by: Martoman on July 24, 2010, 06:36:26 pm
Post by: Blakhitman on July 24, 2010, 07:08:44 pm
http://www.megaupload.com/?d=PP7D56SI
NEAP 2008 Chemistry tests with answers
-Electrochemistry
-Rate,heat and equilibium reactions
-Energy sources and the energy of chemical reactions
-Equilibrium and industrial production of chemicals
I LOVE YOU!
Also i will take off one mark for my saying on 2bii that it has gone to completion. 34/35. sigh. :smitten:
I'm pretty sure it has gone to completion and their answer is incorrect. The reaction isn't even reversible so how could it have reached equilibrium?
Post by: Martoman on July 24, 2010, 07:16:25 pm
Post by: kazzam on July 24, 2010, 07:20:48 pm
kazzam do you have these diagnostic topic tests for any other subjects?
Unfortunately no, only have a few chemistry ones right now.
http://www.megaupload.com/?d=DZODQZJ6
Another 3 tests with solutions
-Lisachem08, Industrial chemistry and Supplying and using energy
-TSFX07, Supplying and using energy
Post by: Blakhitman on July 24, 2010, 07:24:08 pm
Yeah. I was thinking that if the H2 is continually given off then it doesn't.
But even if the reaction was contained in an isolated system, since the reaction isn't reversible, doesn't that mean it can't reach equilibrium?
Since equilibrium means the FWD and BWD reactions are occurring at the same rate?
kazzam do you have these diagnostic topic tests for any other subjects?
Unfortunately no, only have a few chemistry ones right now.
http://www.megaupload.com/?d=DZODQZJ6
Another 3 tests with solutions
-Lisachem08, Industrial chemistry and Supplying and using energy
-TSFX07, Supplying and using energy
Legend!
Post by: Whatlol on July 24, 2010, 07:27:43 pm
Post by: Martoman on July 24, 2010, 07:28:29 pm
Wow kazzam thanks heaps!
This. :smitten: :smitten: :smitten: :smitten:
Post by: aznanthony on July 24, 2010, 09:15:20 pm
Post by: akira88 on July 24, 2010, 11:58:51 pm
Post by: Whatlol on July 25, 2010, 12:04:09 am
kazzam has more karma than posts LOL.
thats pro
Post by: caramellatte12 on July 17, 2012, 06:27:59 pm