Changes in Systems

[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?

[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

[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).

[Ana Pedreros]

If temperature changes the equilibrium constant, then can Q be compared to K?