00:06
Enthope of sublimation for dry ice is 571 kilojoules per kilogram at negative 78 .5 degrees c.
00:35
And we're told that 100 .0 joules of energy are transferred to dry ice at negative 78 .78.
00:52
0 .5 degrees c.
00:59
We're told that the density of co2 gas is equal to 1 .98 grams per liter.
01:14
And then we're asked to find the volume.
01:19
Find volume.
01:25
I'm going to scroll down here and see, yep, okay.
01:30
So what we're going to do is we're going to say we're going to look at our change of heat for co2.
01:40
2 s to co2 g or yep g is equal to mole what is this going to be what was i given i go up a little higher make sure my units kilojoules per kilogram equals 571 kilojoules per kilogram which is equal to okay that's fine i'll just leave that like that and this whole thing is carried out at 78 .5.
02:30
So we'll take that number times my kilogram.
02:47
So i know that i was told we have 100 joules, which i will change to 1 ,000 joules per kilojoules will equal 571 kilojoules for kilogram times x.
03:11
X will equal 0 .1 divided by 571 is 1 .7513, i'll round later, kilograms.
03:48
1 .7513 kilograms times 1 .71513 kilograms times 1 gram, or i forgot my times 10 to the, make sure i put my times 10 to the, that's wrong two, times 10 to the minus 4...