00:01
To calculate the total amount of energy for the entire process, we need to calculate the energy associated with each step.
00:08
First, we're going to warm up the ice.
00:14
It's at negative 85 degrees celsius.
00:17
So we need to take the specific heat of ice multiplied by the mass of ice, multiplied by the change in temperature.
00:23
We're going to go from negative 85 degrees celsius up to zero, so that's the change in 85 degrees.
00:30
And we get 13 ,324 jules or 13 .32 kilojoules.
00:38
Next, once we've warmed the ice, we need to melt the ice.
00:42
To carry out this calculation, we'll start with the mass of the ice, divide by the molar mass of water, ice, to get moles.
00:52
Then we can multiply by the delta h of fusion that's provided at 6 .01 kilojoules per mole.
00:57
And we get 25 .02 kilojoules.
01:01
Now that we've melted the ice, it's water, so we need to warm the ice 100 degrees celsius, from 0 degrees celsius up to 100 degrees celsius.
01:11
To carry out the calculation for heat, we'll use again the heat equation, q equals specific heat times mass times change in temperature...