00:01
We have three chemical reactions here, and we need to balance them as well as track the states and do some molecular formula identification.
00:09
So the first one, we have pentane, and it tells it's a liquid, and that's c5h12, and that's reaction with octet.
00:15
Reacting with oxygen and the gas phase create co2 in water.
00:20
And so this is a combustion reaction.
00:22
And so before i balance it, i'm going to assign states to these reactions.
00:26
And so for combusting pentane, with oxygen, that's like a fire.
00:34
So it's going to be really hot, right? and so co2 is always going to be a gas.
00:37
And h2o, it's going to come out as a gas in the water vapor.
00:40
It's not going to be, like when you burn a fire, you're making water, but you don't see it because it's leaving as a gas phase substance.
00:47
And so that's going to be a gas.
00:48
So both of these are gases.
00:50
In the product phase, all right.
00:53
And so now let's balance it.
00:54
Here we see we have five carbons on this sign, and we only have one carbon here.
00:59
So let's make that five carbons.
01:02
So now we have five carbons on each side.
01:08
Next, we have 12 hydrogens.
01:14
We have no hydrogens in this species, and we have two hydrogens here.
01:19
So if you multiply this by six, we have 12 hydrogens, right, six by two on this side.
01:26
So we have five and 12, five and 12.
01:28
So that leaves just the oxygens.
01:29
So here we have two oxygens in the o2.
01:32
Here we have 5 times 2, so 10 oxygens in that species, oxygen.
01:38
And then we have 6 times 1, so 6 oxygens on this side.
01:43
So we have a total of 16 oxygens on our product side, and we only have 2 of this side.
01:49
So we need to multiply this by 8.
01:51
8 by 2 makes 16 oxygens, 16 oxygens, 5, 12, and 16.
01:57
So now we're balanced here.
01:59
So this is our final state where 1 -pentane, max with 8 oxygens.
02:03
To make 5 -co2 and 6 water.
02:09
The next reaction we have sodium, which will be a solid, is react with water in the liquid stage.
02:17
And so sodium and water react in an exothermic reaction, and it makes sodium hydroxide and hydrogen.
02:26
So hydrogen is going to leave as a gas.
02:28
Usually when you see h2, it's almost always going to be in the gas phase.
02:32
Sodium hydroxide doesn't leave the water...