00:01
This question is going to take a look at comparing orders of boiling points for three substances that are all in the same family on the periodic table.
00:09
We've got a hydrogen sulfide, we've got a water, and we've got a hydrogen selenide that we're going to take a look at, and basically us to rank their boiling points.
00:19
And so first thing we want to recognize is they're all in group six or 16 of the periodic table.
00:26
Oxygen's at the top, followed by sulfur, followed by the selenium.
00:31
And so on.
00:34
And so the first thing we sort of want to consider when we're looking at boiling point is how strong are the intermolecular forces or attractions that hold together the molecules.
00:46
They call these imfs.
00:48
So water has the ability to form one of the strongest intermolecular attractions, hydrogen bonding.
00:56
Water has oxygen bonded to a hydrogen that makes it a hydrogen donor, but it also has the ability to accept that hydrogen by having lone pairs of electrons on oxygen.
01:10
So it has the perfect scenario to create some of the strongest intermolecular tractions.
01:16
That's hydrogen bonding.
01:19
And so just looking at that, recognize that the stronger the intermolecular forces, generally speaking, the higher the boiling point will be for that substance.
01:28
The stronger intermolecular attractions means more energy required to break those intermolecular attractions apart...