OMG CHEMISTRY UNIT 1 PAPER!!!!!!!!!!!!

[aniekan]

hahahah awh thankss ur genius urself too no doubt in that ^.^

hahha I am Thanks xD

 

[svenas]

hahha I am Thanks xD

what was the answer for question abt hess's law in section A.....was it A or B??

 

[aniekan]

what was the answer for question abt hess's law in section A.....was it A or B??

it was delta H1 - Delta H2

 

[svenas]

it was delta H1 - Delta H2

yeh i thnk that one i chose...B ryt?

 

[aniekan]

yeh i thnk that one i chose...B ryt?

probably I can't recall the options

 

[baz123]

First of all, I agree this paper was way different and more harder compared to all the past papers I've seen!
And I thought it was asking for hydrated crystals so it was going backwards so
I wrote -DeltaH1 + Delta H2.. I have no clue though

 

[aniekan]

First of all, I agree this paper was way different and more harder compared to all the past papers I've seen!
And I thought it was asking for hydrated crystals so it was going backwards so
I wrote -DeltaH1 + Delta H2.. I have no clue though

My worse mistake xD

Drawing Lithium Iodide as a covalent bond xD---I mean How stupid was I xD

 

[Mewan95]

My worse mistake xD

Drawing Lithium Iodide as a covalent bond xD---I mean How stupid was I xD

They didnt tell us to draw lithium iodide... :/ The told us to draw the lithium ion and the iodine ion... :/

 

[Stormcry72]

First of all, I agree this paper was way different and more harder compared to all the past papers I've seen!
And I thought it was asking for hydrated crystals so it was going backwards so
I wrote -DeltaH1 + Delta H2.. I have no clue though

it was asking for formation of hydrated crystals, so it is an exothermic reaction. the other 2 are endothermic as u form dehydrated sodium something (cant rmember the compound name exactly). delta h1 = delta hf + delta h2. re arrange, it becomes delta hf = delta h1 - delta h2

 

[aniekan]

They didnt tell us to draw lithium iodide... :/ The told us to draw the lithium ion and the iodine ion... :/

lol well then -- i failed both xd

 

[Mewan95]

yeah you are right C -12 with 6 protons.

What about carbon 13?

 

[svenas]

Guyssssss.....for jan 2012, the curve was 54/80 minimum for an A...so take it easy....I thnk ours will be same yeeeehhh !!
http://www.edexcel.com/iwantto/I want to Tasks/1201 GCE Units Grade Boundaries (Home Int).pdf
CHECK !

 

[aniekan]

What about carbon 13?

it cant be carbon 13 because the other element had a mass number of 3---- N-14 + n- 1 total mass number = 15 .... 15 - He- 3 = 12 so it's carbon -12

 

[aniekan]

Guyssssss.....for jan 2012, the curve was 54/80 minimum for an A...so take it easy....I thnk ours will be same yeeeehhh !!
http://www.edexcel.com/iwantto/I want to Tasks/1201 GCE Units Grade Boundaries (Home Int).pdf
CHECK !

well lets hope for the best grade

 

[Mewan95]

Oh yeah..jus analysed it again..it breaks up into carbon-12 and hydrogen-3...my bad..sorry.

 

[Lost_Life]

once you think about it..it wasn't THAT BAD

 

[tanzina500]

Guys guys guys guys guys guys guys one Q.. what in the name of God was the next element wen Nitrogen and some kinda "e" thingy broke down, u knw the question bout Hydrogen isotopes?
hhahaha i wrote CARBON :3

me tooooo..

 

[tanzina500]

once you think about it..it wasn't THAT BAD

yeah,nw i knw dat my exam wasnt THAT BAD!!!!!

 

[tanzina500]

I wrote for type of reaction.....free radical formation...is it ok?

i wrote homolytic fission n condition is UV radiation!

 

[tanzina500]

Free radical substitution ? I doubt that cus it asked for step 1 : I wrote xD-- free radical Homolytic fission

Well I don't know which is right or wrong xD

i jst wrt homolytic fission!