00:01
Problem 16 has a lovely combustion reaction for us.
00:05
Look at that.
00:06
They've given us 5 .2 liters of ethane gas.
00:10
And we're going to be combusting it in the presence of oxygen, great to produce carbon dioxide and water.
00:17
We're asked, how much oxygen gas do we need to fully combust all of our ethane gas? and you've done reaction completions before, very likely.
00:31
But in the past, you would have probably been told you've got 13 grams of something.
00:37
And the first step in that instance would have been to convert your grams into moles.
00:43
But we're dealing with gases here.
00:45
We've been told that all of our gases are at the same temperature and pressure, and we're just assuming that they're under normal temperatures and pressure.
00:52
So ideal gas circumstances.
00:55
And in that case, we actually have a bit of an easier time.
01:00
Let me show you what i mean.
01:00
This is all i have to do, and we'll talk about why afterwards.
01:04
I'm going to start with my 5 .2 liters of ethane gas, and i'm going to simply make a ratio using the reactants portion, where for every two molecules of ethane gas, i am required to have seven oxygen gas molecules...