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Changes in Systems

Posted: Fri Jan 11, 2019 7:31 pm
by Jessica Helfond 2F
In lecture, Lavelle's slides said for changes in pressure, K does not change, whereas for changes in temperature, K does change. Was this just an example or is this always the case? If it's always the case, why does K change for temperature and not pressure?

Re: Changes in Systems

Posted: Fri Jan 11, 2019 7:46 pm
by Xuan Kuang 2L
I believe that this is always the case. There is an equation relating the temperature to K that may help you understand why, and you can see the full derivation of it in the textbook (For me, it is in 5H, pg 413, not sure about the 6th edition)

Hop this helps

Re: Changes in Systems

Posted: Fri Jan 11, 2019 11:55 pm
by Chem_Mod
Changing the pressure/volume of a reaction does not change the equilibrium constant but changing the temperature ALWAYS changes the equilibrium constant. This is becasue an equilibrium is in essence, a ratio of the rate constant of the forward reaction over the rate constant of the reverse reaction. These rate constant are dependent on temperature (but not a pressure of volume).

Re: Changes in Systems

Posted: Sat Jan 12, 2019 2:02 pm
by Ana Pedreros
If temperature changes the equilibrium constant, then can Q be compared to K?