Ice is used in a cooler in order to cool its contents. Which of the following will speed up the process?
A) Wrap the ice in a metal foil
B) Drain the water from the cooler periodically
C) Put the ice as a single block
D) Crush the ice
Here are my arguments (maybe wrong, confused b/w the options):
For option A, wrapping with a metal foil would improve conduction.The air would get cooled by convection which I believe is slower.But even at the surface of the metal the heat exchange takes place through convection.
For option B, if the excess water is drained periodically, the ice would melt by heat transfer through air instead of the water cooling.But would this happen?Because the water and the ice are at the same temperature so no conduction?
For option C, I think its the worst idea among the given options.
Option D, crushing the ice will increase surface area but we would do work on the ice therefore partially melting it.
So what would be the most appropriate option?