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  • 11 June 2024
    Austin Dwyer
    R1 What drives chemical reactions?
    Has the oxygen been intentionally left out of the products in question 1?
  • Hi AustinGeoff is away on holiday at the moment (he may pick up on this when he's back). Given the new syllabus - as you point out, I think it's highly unlikely that SL students would ever get a question about IR activity linking to change...
  • 10 June 2024
    Austin Dwyer
    R1 What drives chemical reactions?
    Hi Geoff,In question 16, you've given one of the options in relation to the change in dipole moment.  In the new syllabus, IR spectroscopy is no longer covered in the Standard Level course and the specification for R1.3.3 links to AHL...
  • 8 June 2024
    Geoffrey Neuss
    R2 (HL) Equilibrium (2)
    Hello Helena, Thank you for your kind comment on the latest edition of my Study Guide. I'm glad you and your students are finding it so helpful.On page 102, the equation ΔG = ΔG⦵ + RTlnQ is being used to show how the value of ΔG changes...