Students writing assessments, catalysts in equilibrium systems and maths in chemistry
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There have been all sorts of discussions on Talk Chemistry recently.
Leonard Winning responded to our Endpoint article on students writing assessments:
I really like the idea of Peerwise: I've registered and am trying it out with my L6 at the moment - the initial response has been very positive. Has anyone else tried this in a school rather than university environment?
Mick Mahon posed this question:
We teach that adding a catalyst to an equilibrium system does not alter the position, just the rate of equilibrium attainment, because it increases the forward and backward rate by the same amount. Why and how can that be? The activation energies will be different for the forward and backward direction. Does a change in forward/backward pre-exponential factors somehow exactly cancel the difference in Ea? Seems hard to believe. Or is it some outcome from the Boltzmann distribution curve? Or some other reason?!
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