00:01
We are given some thermodynamic properties of water.
00:07
I'm just reading those here.
00:09
And we are told that we have 283 grams of water.
00:20
And we're going from an initial temperature of 89 .5 degrees celsius to a final temperature of 161 degrees celsius.
00:35
And here, that would be like from here to here.
00:37
Not to scale.
00:47
So this is water.
00:48
So we're going to have one, two, three steps.
00:51
This is going to be a three -step problem.
01:03
We're given that the, i'm looking to see here, we're getting jewels per mole.
01:17
What am i doing? okay.
01:27
My specific heat for my liquid is equal to 75 .3 joules per mole.
01:43
My specific heat for my gas is 33 .6 joules per mole.
01:57
My, and that should be degrees c.
02:09
I'm going to have to fix those in a minute.
02:11
And my heat of vaporization was 40 .67 kilojoules.
02:37
Okay, i'm using a different pen, so i'm having a tough time making sure everything is nice and legible.
02:47
161.
02:49
Yes.
03:30
Okay.
03:30
I think that's everything i need.
03:34
I don't need my heat of fusion.
03:36
I just need my heat of vaporization.
03:40
For steps 1 and 3, which are right here, we will use q equals mc delta t.
03:55
And for step 2, which i will use, let's use green.
04:11
We will use q equals n times heat of vaporization.
04:18
And in order to do any of these, i see i've got moles, moles, and moles.
04:25
I'm going to have to convert 283 grams of water to moles of water...