00:01
So continuing on with physical chemistry, the first thing we're looking to do here is solve for the relationship between ca and ca naught at t.
00:11
So ca equal to 1, divided by 1 over ca0.
00:20
So that's the relationship of negative kt.
00:25
So in the second part, we are solving for the half -life.
00:29
So it's important to note that c -a -0 is equal to n -a -0 over 3.
00:33
Which is equal to po over rt by the ideal gas law.
00:37
And so we can simplify this equation that we've just written on the screen.
00:46
And solve for t half, that is rt over kp not.
00:57
So when 50 % of a conversion occurs, that is half the moles of a, form half the moles of b and a quarter of the moles of c.
01:05
And so the total number of moles is 1 .25n.
01:09
The pressure we can calculate as follows.
01:15
P 1 .5 is equal to 1 .25 n .a .0.
01:21
R t over v.
01:24
P 1 .5 is equal to 1 .25 p .0.
01:30
So following this we can plot the graph of 1 over p .0 versus t 1 .5...