Turn on thread page Beta
    Offline

    13
    ReputationRep:
    Could someone possibly draw the Born Haber cycle of June 2010 paper and illustrate the answer? I don't understand them in the new papers. Which is weird!
    Offline

    0
    ReputationRep:
    (Original post by jwest)
    ahh ok thanks for that, so you get more molecules on products cos the reaction might be for example

    [Cu(h20)6]2+ + [EDTA]4- ---> [Cu(EDTA)]2- + 6h20

    2 molecules goes to 7 molecules hence the increase the entropy...is that along what you were saying?
    Yes thats exactly it!
    It is a reversible reaction but the reverse reaction would make less particles, which means theres a decrease in entropy so its not very likely to occur. So you basically assume its only a forward reaction because the equilibrium is so far to the product side. Hope that helped.
    Offline

    0
    ReputationRep:
    coolio, thats 3/4 marks out of 100 nailed....makes an A slightly more achieveable, i guess
    entropy is just such a ***** when i try and thing about it all i remember is brian cox making sandcastles!
    Offline

    0
    ReputationRep:
    (Original post by jwest)
    coolio, thats 3/4 marks out of 100 nailed....makes an A slightly more achieveable, i guess
    entropy is just such a ***** when i try and thing about it all i remember is brian cox making sandcastles!
    hahaha me too. I didnt really get it until i watched that.
    Offline

    0
    ReputationRep:
    (Original post by jwest)
    coolio, thats 3/4 marks out of 100 nailed....makes an A slightly more achieveable, i guess
    entropy is just such a ***** when i try and thing about it all i remember is brian cox making sandcastles!
    Our teacher whacked out some really old entropy videos too haha
    Offline

    2
    ReputationRep:
    Is it just me who finds the mark-scheme so fricking specific: bond pair, alternative route, covalent and molecular etc.?
    Offline

    13
    ReputationRep:
    (Original post by JK471993)
    Is it just me who finds the mark-scheme so fricking specific: bond pair, alternative route, covalent and molecular etc.?
    Out of all the units I find this one to be the most specific! :mad2: The book content is pretty vague on this unit! :mad2:
    Offline

    0
    ReputationRep:
    (Original post by JK471993)
    Is it just me who finds the mark-scheme so fricking specific: bond pair, alternative route, covalent and molecular etc.?
    i dunno, sometimes it is but sometimes for the colours of complex ions, its really vague and you can get away with quite alot so mix and match i guess
    Offline

    0
    ReputationRep:
    (Original post by a23m)
    I think it maybe one of those things you just have to learn. Periodicity is immensely boring, theres not a lot of theory, just memory.

    I'd suggest remembering it as...
    ionic on the left of the periodic table (sodium and magnesium)
    and
    covalent on the right of the periodic table
    Aluminium is a funny one though, its a bit of both!
    It really is! I don't mind the other stuff but I hate periodicity :/ Ah thanks, that actually helped!
    Offline

    0
    ReputationRep:
    (Original post by Anon1993)
    Hahaha S'okay - i know the feeling
    but ionic, ionic, both, giant covalent, simple, simple. .
    Make up your own rhyme?
    :/ I read it back and thought what on earth... Haha
    Okay got it, I just sung it to myself, hopefully I remember it! LOL thank you
    Offline

    0
    ReputationRep:
    Hows everyone getting on??
    Offline

    0
    ReputationRep:
    (Original post by Sparkly-Star)
    Out of all the units I find this one to be the most specific! :mad2: The book content is pretty vague on this unit! :mad2:
    I agree :/ i've just been doing some papers and am looking at the mark scheme going WTF? never heard of that before!
    Thank god I only need a really low grade in this, im terrible at it!
    Offline

    0
    ReputationRep:
    (Original post by strawberry_cake)
    Hows everyone getting on??
    Im just working on my timing with papers now,

    how about you?
    Offline

    0
    ReputationRep:
    what sort of marks did people get on the jan 11 past paper?! i find it so hard! theres too many equations for this unit
    Offline

    10
    ReputationRep:
    (Original post by SashaLuLu)
    what sort of marks did people get on the jan 11 past paper?! i find it so hard! theres too many equations for this unit
    I got 81, just below an A*! haha
    Offline

    0
    ReputationRep:
    heyy can anyone post the jan 11 paper and markscheme please?
    Offline

    0
    ReputationRep:
    (Original post by Arab_Empress)
    Im just working on my timing with papers now,

    how about you?
    I only started papers today and didnt have enough time to do them so just read through them.. I hope they've settled in :cry2: I think I'm gonna go through the spec now and go through the 'leftovers'. Chem5's boring me How are you finding the papers? The old spec were a lot easier then the new ones i think :/
    Offline

    0
    ReputationRep:
    (Original post by alprescott1)
    heyy can anyone post the jan 11 paper and markscheme please?

    http://www.a-levelchemistry.co.uk/AQ...ids%20home.htm

    Offline

    13
    ReputationRep:
    It's funny how I've not learnt about the perfect ionic model from my book.
    Offline

    0
    ReputationRep:
    Thanks!
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: August 20, 2011

University open days

  • University of Exeter
    Undergraduate Open Days - Exeter Campus Undergraduate
    Wed, 24 Oct '18
  • University of Bradford
    Faculty of Health Studies Postgraduate
    Wed, 24 Oct '18
  • Northumbria University
    All faculties Undergraduate
    Wed, 24 Oct '18
Poll
Who is most responsible for your success at university

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.