## Dissociation of X2 Molecule

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Jacob Afable 3J
Posts: 41
Joined: Fri Sep 25, 2015 3:00 am

### Dissociation of X2 Molecule

Could someone help me clarify how to tell from the 4 flasks given in 11.7 which one is at equilibrium? What am I supposed to notice?
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NeelPatelLec4
Posts: 6
Joined: Fri Sep 25, 2015 3:00 am

### Re: Dissociation of X2 Molecule

You are supposed to count the number of molecules of X2 that dissociate to X molecules, so in the first picture there are 11 X2 molecules and 0 X molecules. In the second picture there are 8 X2 molecules and 6 X molecules, meaning that 3 X2 molecules dissociated. In the third picture there are 5 X2 molecules and 12 X molecules, so there have been 3 more X2 molecules that have dissociated for a total of 6 X2 molecules. Finally, in the fourth picture there are still 5 X2 molecules and 12 X molecules, meaning that no new X2 molecules have dissociated, there was no change between the third and the fourth picture. This means that the equilibrium was reached in the third picture since there was no net change between the third and fourth picture.