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  1. A

    AS Chemistry P2 Prep.

    Yup. You can see the area shaded is larger when the temperature is higher.
  2. A

    AS Chemistry P2 Prep.

    The area under the graph (Boltzmann distribution) represents the amount of molecules which either possess enough energy to overcome the activation or not. The amount of molecules to the left of the activation energy is the amount that HAS the required activation energy. Uhm... Hope that helps.
  3. A

    AS Chemistry P2 Prep.

    I'm eternally grateful to you. God bless you! Thanks a bunch again.
  4. A

    AS Chemistry P2 Prep.

    Thank you so much! But i have a question, why did you reverse the signs for the enthalpy energies you calculated? Why +23.3 became -23.3?
  5. A

    AS Chemistry P2 Prep.

    Yeah I still don't get it because the reply wasn't specific to this question. Would you kindly point out the answer for me?
  6. A

    AS Chemistry P2 Prep.

    http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w11_qp_21.pdf For question 3 d, how do you draw the Hess Law diagram? It doesn't seem to work out when I try using both diagrams in the coursebook for enthalpy change of reaction and combustion.
  7. A

    AS Chemistry P2 Prep.

    I am very bad at enthalpy changes. Can someone please help me? I always seem to get the calculations wrong. http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Chemistry%20(9701)/9701_w11_qp_21.pdf For question 3 d, how do you draw the Hess Law diagram? It...
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