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Equilibria, Energetics and Elements (F325) - June 2011 Exam.

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Reply 1840

GreenVet

Original post by joe3469

Nice one dude. All these answers are the same as mine :smile:

I thik i got the same too, just the Magic Tang question and some ionic equations caught me out.

Reply 1841

Kalamari Dave

Original post by Teva

What did people get for the Kc value with gases in 2dm^3 ????????

45?

Reply 1842

J DOT A

Original post by polzeath.sunset

I didnt think Br2 was first order, as the half lifes from 0.01 to 0.005 was 190s, 0.006 to 0.003 was 200s and 0.004 to 0.002 was 210 seconds....

so i said 2nd order :/

I thought exactly that however it is first order. They wouldn't ask you to find a second order with non constant half life. The curve is just a line of best fit.

Reply 1843

Student21

Original post by polzeath.sunset

I didnt think Br2 was first order, as the half lifes from 0.01 to 0.005 was 190s, 0.006 to 0.003 was 200s and 0.004 to 0.002 was 210 seconds....

so i said 2nd order :/

Thats what i got. I also put second order. Hope it's right i need all the marks i can get now.

Reply 1844

cws121

i got something like 36 for the KC value and s-1 units, i dno if its right tho

Reply 1845

Kalamari Dave

I wish i could switch the marks i get for this paper with the f215 paper :frown:

Its practically guaranteed to be better, but I need the biology grade more :frown:

(edited 12 years ago)

Reply 1846

Perky perks

i think i got so tired by question 6 i was making it into my own words :/ like i read whatever his name was discovered nickel instead of dissolved it :s-smilie:

didnt like it and ran out of time :frown:

Reply 1847

joe3469

Original post by polzeath.sunset

I didnt think Br2 was first order, as the half lifes from 0.01 to 0.005 was 190s, 0.006 to 0.003 was 200s and 0.004 to 0.002 was 210 seconds....

so i said 2nd order :/

It's because its experimental and may not be exact results so it is definitely close enough to be first order!

Reply 1848

Teva

Original post by Kalamari Dave

45?

oh i got 720! oops..

Reply 1849

wilsea05

easy peasy

edit: loooool i knew i'd get neg repped :L

(edited 12 years ago)

Reply 1850

Sceaga

did everyone else get -108 for the gibbs question?

wow that was bad!!!

fml, But hopefully i'll get ecf? FAIL FAIL FAIL.

Reply 1853

KnuckleheadNinja

DAMN YOU MAGIC TANG!

after the ~~Biology~~ Ecology paper the other day and this thing today....

well....

id better get used to making burgers now.

Reply 1854

Kalamari Dave

Original post by wilsea05

easy peasy

Reply 1855

Frankie

Original post by polzeath.sunset

I didnt think Br2 was first order, as the half lifes from 0.01 to 0.005 was 190s, 0.006 to 0.003 was 200s and 0.004 to 0.002 was 210 seconds....

so i said 2nd order :/

I said the same thing lol I looked at the same half lives as you, but then I got confused because I thought you had to draw a graph of rate/conc^2 to prove 2nd order... :s

Reply 1856

cawse879

wasnt sure about the condensational polymer question deffo no marks for that.
was the co ordiantion number 4 and molecualr formual c10h8n2? Buffer question was tricky.
the entropy one was easy but the last tick i put decreased cause just looked at gaseous moles.
for the long transition element question you didnt have to always use nickel did you?
bond angle- 90 degress.
precipitate- ni(oh)2
first formular i put ni(cl)4 2- ?
the isomerism in the complex ion was optical wasnt it?
the battery i got ni reduced +3 to +2.
and cadmium oxidised 0 to +2.

Reply 1857

Jsmalley1

720 for the value of Kc?

Reply 1858

brobro

Original post by KnuckleheadNinja

DAMN YOU MAGIC TANG!

after the ~~Biology~~ Ecology paper the other day and this thing today....

well....

id better get used to making burgers now.

i thought the biology was a piece of piss compared to this. This chem paper was the hardest ever.

Reply 1859

kjm230293

Original post by polzeath.sunset

I didnt think Br2 was first order, as the half lifes from 0.01 to 0.005 was 190s, 0.006 to 0.003 was 200s and 0.004 to 0.002 was 210 seconds....

so i said 2nd order :/

I did the Same and got it as 2nd order :/ before it wasn't constant half lifes so couldn't be 1?

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Equilibria, Energetics and Elements (F325) - June 2011 Exam.

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