00:01
Okay, so for this question, they tell us the heat of fusion of water is 333 joules per gram.
00:06
They tell us each ice cube weighs 62 grams and we have 16 cubes per tray.
00:12
They want us to calculate how much energy is required to melt a whole entire tray of ice cubes from liquid water to form liquid water.
00:21
Right.
00:22
So the equation we need to use is q is equal to m, which is the mass and grams times it by the heat of fusion.
00:30
The reason why temperature isn't involved involved in this equation is because when we're melting ice to water, ice melts the water at zero degrees celsius.
00:41
So when we have all ice and it melts to water, it stays at zero degrees celsius until all ice is melted to water.
00:47
Then it can increase in temperature.
00:49
That means that the delta t will be zero and we can't have, if we have a zero in the equation, then this whole thing is zero.
00:56
So we can't do that.
00:57
So what is the mass? so we have one cube, but they tell us how much to melt a whole entire tray...