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  • 5 June 2024
    Xiaodan Wang
    R1.1 Measuring energy changes
    Dear Geoffery,Thank you for the resources and thought-provoking questions! I also agree the enthalpy diagram can be misleading to students but for different reasons. Please hear me out and let me know if I am correct/incorrect. The y-axis is...
  • 3 June 2024
    christine ziadat
    R2.2 Rate of reaction & collision theory
    Thank you 
  • Hi Geoffrey, Okay, thank you! Amy 
  • 2 June 2024
    Geoffrey Neuss
    Major changes for the 2023 programme
    Hi Amy, Although that equation is no longer given in the data booklet, the linear (logarithmic) form from which it is derived still is.  Section R2.2.13 states "Determine the activation energy and the Arrhenius factor from experimental...