00:01
We are asked to determine the total energy in jules, when an ice cube that weighs 8 .0 grams, warms from initial temperature of negative 4 .70 degrees c to 0 .00 degrees c, and then melts.
00:30
We're supposed to report to three significant figures.
00:33
We're told that the specific heat of ice is 2 .04 j over degrees c.
00:48
It should be j over g degree c.
00:50
Yep, i can't read what it says.
00:53
And we're told that the heat of fusion is 6 .01 kilojoules per mole.
01:06
So i like to do these in two steps.
01:09
Step one will be using q equals mcat.
01:19
And we'll substitute.
01:20
Eight grams times 2 .04 j over g degrees c times our change in temperature, which will be 4 .70 degrees c.
01:41
Let me grab my calculator.
01:44
Please be charged, please be charged...