00:01
I don't see what the question is, but i'm assuming that the question is simply which one of these is correct or which one of these is incorrect.
00:11
The lowest energy is always when we have the two biggest groups farthest away from each other.
00:18
So to state that the lowest energy is going to be when these methyl groups, which are bigger than the hydrogen groups, are right on top of each other, is false.
00:29
This would actually be the lowest energy where we have two of these methyl groups as far away from each other as possible, 180 degrees from each other.
00:40
So this one is incorrect.
00:43
Here again they have the lowest energy where two big groups are next to each other.
00:48
It would be the highest energy if this ethyl group, which is the biggest of all, is right on top of the methyl group.
00:57
If two methyl groups are right on top of each other, that's still pretty high energy and definitely not the lowest energy.
01:06
So this one's incorrect.
01:09
Then the next one, the lowest energy shows two methyl groups as far away from each other as possible.
01:16
But the ethel group, which is bigger than the methyl group, is kind of close to the methyl group...