Mystery of life #439,623... why is it that the water in the pot that is heating on the stove seems like it's the perfect temperature, yet when I pour the water into my cup of hot chocolate mix, it suddenly becomes scalding hot, so that I can't drink it for 15 minutes?
Did you taste the water from the pot, or did u just touch it? Also, are u using an enclosed container (i.e. lid on top of the cup)? What kind of cup are you using?
I used a spoon to taste the water out of the pot, and before it came to a boil I poured the water into a tall blue plastic cup/glass (no lid). Stir the hot chocolate and... POOF, to hot to drink (too hot for me, anyway)
The spoon (metal) conducts heat better thn the plastic cup, so the spoon absorbs more of the energy from the water, lowering the avg. temp of the water in the spoon relative to that in the cup.
Also, I believe that since the volume of water in the cup is greater than that in the spoon, the average temperature of the water in the cup is higher than that in the spoon since the former contains more energy (as temperature is a measurement of the average kinetic energy of the molecules)
So I think it's a combination of these.
edit: I had a bunch of other stupid ideas, but i think these are most likely correct (or close to it).