It is said that if there is a change in pressure in an equilibrium state, the chemical reactions that diminish the number of molecules will be favorised. Therefore, there will be less molecules, so the pressure will decrease to reach equilibrium again. However, since the kinetic energy of the molecules doesn't change before and after the reactions, if there are less molecules, those molecules will be slower but heavier. So, according to me, the pressure wouldn't change because the collisions will be less but each collision will apply more force. What do you think about that?