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    (Original post by king1234)
    how many questions where they after that electrophillic question guy next to me missed out all questions ater that thought the exam paper was finished,
    there were 7 questions in total i think.
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    (Original post by darkxangel)
    Work out enthalpy change of formation -1279

    Why can enthalpy change of formation not be measured directly?
    high activation, more than one product...

    In terms of rate of reverse reaction and rate of forward reaction, explain how the mixture reaches dynamic equilibrium: rate of forward reaction is the same as the rate of backward reaction.

    same temperature but a higher pressure: same amount of moles in each side, collision theory,

    Why cannot it reach equilibrium in a car engine?
    not a closed system, temp. not high enough,

    What is enthalpy change of formation /2 = +33

    NO has is a radical, what does it tell you about the molecule?:
    has a free electron to give away or something

    Draw a tertiary alcohol of C4H10O
    Name it:

    CH3
    CH3-C-OH
    CH3

    Draw the alcohol that can be oxidized to make butanone
    2-methyl ethanol i think.

    How does it break down ozone?
    NO+O3-->NO2 + O2
    NO2+O3-->NO+202
    203+O2-->4O2

    NO acts as a catalyst

    Which one is cracking
    5 i think

    Which does not have 100% atom economy:
    1 think,

    Which forms structural isomers

    Fermentation & atom economy & percentage yield
    could say either one if you explained why

    For the nuclear substitution i got: something OH+KBr
    -The substitution of Br would be faster, because the C-Br bond strength/enthalpy is weaker than the C-Cl bond.
    -it was heterolytic fission

    Shape question:
    tetrahedral, because electron pairs repel each other and go as far apart as possible.
    next one was trigonal planar,

    complete combustion:
    CH3OH+1.5O2-->CO2+2H20

    Incomplete combustion:
    CH3OH+O2-->CO+2H2O

    Question 5:
    add H2 to the double bond
    2 isomers of adding HBr across methyl-cyclohexene double bond

    another use for Methanol question:
    feedstock for chemical processes

    Name alkene used to make polymer: but-1-ene

    What do CO and HCl do to environment, what are chemists doing to minimize damage?

    CO:'greenhouse-effect/global warming', adding to carbon footprint, toxic, reduces the ability of blood carrying oxygen
    HCl:acid rain, irritant-harms environment,
    finding a use for CO-
    HCl can be used as a catalyst-which i'm not so sure about, to neutralise over-alkaline soil for agriculture,

    Importance of international protocol agreements?
    Put down something about communicating and educating other countries who are not aware of impacts of high carbon emission to reduce global-warming. Since i didn't revise this bit i made up a lot rubbish. :/

    alcohols liquid question:
    alcohols have hydrogen-bonding because of OH groups which is stronger than van der waals forces.

    A Functional group: is a group attached to and organic compound and determines its chemical properties.

    dissolve water question:The reason why poly methanol dissolves in water is because it hydrogen bonds with it.

    For the last question I wrote down the formula not the names-can't quite remember the answer, but you had to work out the empirical formula and then times it by two o find a carboxylic acid for X-C3H8O2>>it was something like this i think.
    For Y the peak was at 46. You had to find the formula of an alcohol i think.
    For Z you would just write an equation and the right formula for the ester.

    some of this might be wrong and it's not in order either.
    c-cl bonds stronger than c-br not weaker
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    (Original post by darkxangel)
    there were 7 questions in total i think.
    how many marks do you think
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    (Original post by king1234)
    how many marks do you think
    why would he do that? did he not turn the page?
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    (Original post by ChessMister)
    why would he do that? did he not turn the page?
    well i asked him he said normally the last question is a 10 marker how mnay marks do you think he has lost
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    (Original post by king1234)
    c-cl bonds stronger than c-br not weaker
    That's what i said :confused:.
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    (Original post by king1234)
    how many marks do you think
    15-20 marks, if he missed the last two questions.
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    (Original post by king1234)
    well i asked him he said normally the last question is a 10 marker how mnay marks do you think he has lost
    The last question was worth 9 or 10- can't remember the others
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    (Original post by king1234)
    c-cl bonds stronger than c-br not weaker
    That is correct. The rate of hydrolysis increases down the group so C-Cl is stronger than C-Br. You have said the same thing just in a reverse basically, it is correct.
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    (Original post by king1234)
    well i asked him he said normally the last question is a 10 marker how mnay marks do you think he has lost
    the last question was a 10 marker.
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    (Original post by nereik6794)
    That is correct. The rate of hydrolysis increases down the group so C-Cl is stronger than C-Br. You have said the same thing just in a reverse basically, it is correct.
    do you think grade boundaries will be higher or lower than jan paper , i think jan paper was a lot easier lol for some reason
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    (Original post by king1234)
    do you think grade boundaries will be higher or lower than jan paper , i think jan paper was a lot easier lol for some reason
    Well, for revision I only took notes really and followed the spec. I did the Jan 2010 past paper and I did part of the Jan 2011 paper but never finished. This is because I hadn't really started revising yet

    So, I'm not too sure I'm afraid. I think alot of people were saying it was harder than past papers they had done though.
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    (Original post by darkxangel)
    the last question was a 10 marker.
    well all he told me was he did that nucluophillic one then missed the rest of pages
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    (Original post by nereik6794)
    Well, for revision I only took notes really and followed the spec. I did the Jan 2010 past paper and I did part of the Jan 2011 paper but never finished. This is because I hadn't really started revising yet

    So, I'm not too sure I'm afraid. I think alot of people were saying it was harder than past papers they had done though.
    well in jan 11 we did it is a mock i got 76, im doubting i have done so good thsi time around how did you draw that monomer out lol question about but1ene
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    (Original post by king1234)
    well in jan 11 we did it is a mock i got 76, im doubting i have done so good thsi time around how did you draw that monomer out lol question about but1ene
    Drew a C=C double bond. 2 H's coming of the right side. One H coming off the left hand side and C2H5 coming off the other bit of the left hand side. I didn't draw n next to it but I don't that will matter
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    (Original post by king1234)
    well all he told me was he did that nucluophillic one then missed the rest of pages
    around 25 i'd say. :/
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    (Original post by nereik6794)
    Drew a C=C double bond. 2 H's coming of the right side. One H coming off the left hand side and C2H5 coming off the other bit of the left hand side. I didn't draw n next to it but I don't that will matter
    lol thats what i did erm how about that ez isomers how come people syaing there was two i only mentioned one cant rember the letter
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    (Original post by darkxangel)
    around 25 i'd say. :/
    allright quiet a lot
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    (Original post by king1234)
    lol thats what i did erm how about that ez isomers how come people syaing there was two i only mentioned one cant rember the letter
    There were 2 but I can't remember what I put either haha. I think it was correct though
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    for the one where u had to draw 2-methyl-propan-2-ol would u get the marks if u drew a DISPLAYED formula ? cus on most mark schemes they seem to have skeletal ?????
 
 
 
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