LeChatelier question! (The effect of pressure)?

Question

The reaction

2NO2 >< N2O4
brown colourless


The reaction is at equilibrium..if we were to reduce the volume (ie increase the pressure), what colour would the mixture be BEFORE equilibrium is re-established?

Answer 1

If you squash this mixture, you will get a more concentrated brown colour before Le Chatelier's principle suggests that the equilibrium will move to the right (to reduce the number of moles of gas and therefore to lower the pressure) and the mixture will go much more pale.

Answer 2

ya its gonna be brown.....1