Chemistry: Heat Transfered in Ice Cream Lab?

Question

The equation for the total heat transferred in a chemistry lab is Q total = Q Heat of fusion + Q water
Then, where does the heat come from and go to specifically? I know that for heat of fusion (the heat comes from the ice cream mixture and goes to the salt and ice mixture), but I am not sure where the heat of water comes from???

Answer 1

There is no Q water until all the ice melts. Then it comes from the ice cream and the surroundings, but you keep adding ice and salt until the ice cream is finished, so there's usually ice in the bucket when you remove the ice cream container.

Answer 2

This recipe was originally written to keep kids entertained while camping but you should get the basic idea. Tin Can Ice Cream 1 Pound Coffee Can ¾ Cup Whole Milk 1 Cup Whipping Cream 1/3 cup sugar ½ tsp vanilla A 3-Pound Coffee Can Crushed Ice ¾ Cup Rock salt Fruit, if desired Roll of duct tape (camper’s friend) Combine milk, whipping cream, sugar, vanilla and, if desired, fruit into the 1-Pound coffee can. Use duct tape to securely fasten the cover on the can. Place inside the 3-Pound coffee can. Surround the smaller can with ice and rock salt. Seal the larger coffee can tightly with duct tape. Kick the can or roll back and forth underfoot for 10 minutes. Un-seal and open both cans, being sure to wipe off the small can before opening, so that the salt does not get into the mixture. Stir the ice cream mixture. Re-seal the small can. Place it back into the big can; add more crushed ice. Re-seal the larger can. Kick it again for 5 more minutes. Options: Strawberry: canned strawberry pie filling (approx 3 to 4 Tbsp or less to suit your taste. Vanilla: Another 1.2 tsp of vanilla extract. Chocolate: add chocolate syrup (approx 3 to 4 tbsp more or less) Or ½ cup of any chopped fresh fruit.