00:01
First we need to calculate the value of the equilibrium constant at the temperature given using δg standard.
00:08
Δg standard equals negative rt ln k, so k is equal to e to the negative δg standard divided by rt.
00:18
So we'll plug in our δg standard value, 40, negative 40 .9 kj is negative 40 ,900 j.
00:27
So we've got this negative and then δg is also negative, making this positive.
00:34
We'll divide by r, 8 .314, and our kelvin temperature, and we get 1 .48 times 10 to the 7.
00:46
Then we'll use the von't hoff equation, where the natural log of the equilibrium constant at one temperature divided by that at another temperature equals negative δh standard divided by r multiplied by the difference in the reciprocal kelvin temperatures.
01:05
So we want to figure out the temperature at which the k value is 1 ,000.
01:10
We'll divide that by the k value that we know and set that equal to negative δh...