Problem: A person fills up a cup of water at a temperature of 25 C, places several ice cubes, which are at -4 C, into the water and set the cup down in a room that is 20 C. They walk away remembering something to do and forget all about the cup of water with ice in it.
A. Explain where heat will flow from and where it will flow to. The three systems to focus on are the air in the room, the water and the ice cubes.
B. State the primary mechanism of the heat flow
- from the ice to the water.
- for the water to all come to the same temperature.
- that is not significant for this problem.