00:01
To determine the equilibrium pressures after the equilibrium has been disrupted, we first need to calculate the kp value.
00:08
Kp will be equal to the pressure of pcl5 divided by the pressure of pcl3 and pcl2.
00:16
These pressures, however, need to be in atmospheres.
00:21
So we'll take the 217 and divide by 760 to get it into atmospheres, and then divide by the pressures of pcl3 and cl2, both at the 3, 13 .2 at equilibrium divided by 760, 13 .2 tour divided by 760 gives us atmospheres.
00:41
And we get a kp value of 946 .5.
00:46
So if we disrupt the equilibrium by increasing the total pressure to 263, then that means we need to have added 19 .6 tour of cl2 so that when we add everything up, 13 .2 plus 13 .2 plus the addition plus 217 all of this will add up to the total pressure of 263 that then tells us how much cl2 we added 19 .6 tour then by increasing the amount of cl2 it has to shift to the right to reestablish equilibrium and in doing so these two pressures will decrease by x and the pcl5 will increase by x.
01:34
So at equilibrium we'll have 13 .2 minus x for pcl3.
01:40
Summing 13 .2 and 19 .6 together, we get 32 .8 and then 32 .8 minus x for cl2 at equilibrium.
01:49
And then we'll have 217 tor plus x for pcl5.
01:56
We can then plug these equilibrium pressures after we convert them into atmospheres back into the kp expression...