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    (Original post by Sh4hid96)
    What did everyone have for the volume of gas?
    0.3something
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    (Original post by anonymousmango)
    What did you put for the delta H and activation energies equation ? I put the delta H equals activation energy of backward reaction minus activation energy of forward reaction, not sure if its right or not?
    I put that too!
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    (Original post by Questioner1234)
    It was the crossing point for me. I think I might have messed it up though. Hopefully get ecf though
    I think we all messed it up... XD
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    (Original post by Questioner1234)
    Put the other way round, page 62 of the revision aid
    DAMMIT you're right. The energy change has to be negative...
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    I also put delta H as equal to Ef -Eb.
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    Did anyone else feel like they were contradicting themselves in the yield question? After the QWC about equilibrium was answered, it said about 900 degrees temperature I just didn't have a clue what to put and only had half a minute left to write something down
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    (Original post by Qwertykeyboard15)
    Did anyone else feel like they were contradicting themselves in the yield question? After the QWC about equilibrium was answered, it said about 900 degrees temperature I just didn't have a clue what to put and only had half a minute left to write something down
    I didn't have time to put anything down. Yeah, it felt odd, because a higher temperature would give a lower yield so I wasn't quit sure what to put.
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    I think I said heterogenous?
    What did you say for the reason the temperature was 900 degrees?
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    1. Fast rate of reaction
    2. Reasonable yield
    3. Compromise temperature
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    I put about a balance has to be reached between a high rate of reaction and yield of NO, and 900 degrees celcius was a good temperature for this.
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    What does everyone think the boundaries will be?
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    What did you guys get for the atom economy question?
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    (Original post by ZeroShun)
    I put about a balance has to be reached between a high rate of reaction and yield of NO, and 900 degrees celcius was a good temperature for this.
    Yes that's what I did!

    I was thrown a bit when I read the question but then I remembered about the rate of reaction thankfully.

    900 degrees had the best balance between rate of reaction and yield
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    (Original post by Mr Bill)
    What did you guys get for the atom economy question?
    18.9
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    What did people put for the chemical properties of the lithium isotopes and also in section A the question that asked about the effect of doubling the volume on the starting rate of reaction ?
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    (Original post by Mr Bill)
    What did you guys get for the atom economy question?
    I think I had 21.8% or something like that?
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    (Original post by Ser_)
    What did people put for the chemical properties of the lithium isotopes and also in section A the question that asked about the effect of doubling the volume on the starting rate of reaction ?
    Same no of electrons in outer shell (and same no protons)

    No effect same concentration and in excess
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    (Original post by Questioner1234)
    18.9
    Nice I had 18.8% as well. Some people in my school had 10% and 30%
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    (Original post by Ser_)
    What did people put for the chemical properties of the lithium isotopes and also in section A the question that asked about the effect of doubling the volume on the starting rate of reaction ?

    Same no. of protons and electrons - 3

    6 Li had 3 neutrons and 7 Li had 4 neutrons
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    (Original post by Questioner1234)
    Same no of electrons in outer shell (and same no protons)

    No effect same concentration and in excess
    Awh crap, I did't understand the question so I put differing melting points -_-

    I said the same for the other one though!
 
 
 
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