00:01
Okay, so this question asks us to explain the trend.
00:06
So first, let's just write down.
00:08
The water has a boiling point of 100 degrees c, and there is hydrogen sulfide, which is minus 60 .7.
00:24
And then it's h2 -sanide, which is minus 40 .5.
00:38
41 .5 and there's tellurite, sorry, let me write down again, which is a telluride, which is minus 2 degrees.
00:57
So first we'll find from water to hydrogen chloride, the atomic number is actually increasing, right, from oxygen to tellurite.
01:12
And for the boiling point, we find, except the water.
01:19
For this three, when you increase the atomic number, when the atomic number increase, right, when you go from top to the bottom in the periodical number table, the boiling point is increased.
01:42
This is pretty easy to explain because we know both of them are molecules.
01:47
So for the molecules, their interactions are actually determined, the intermolycular interaction are determined by the vanderwords force.
01:59
And they are polar molecules, so they have dipo -dipore interactions...