If i know the temperature of a mass of black coffee (say 0.4kg at 350K) and I know the mass and temperature of some milk (say 0.1kg at 280K) and i assume that both of these have the same specific heat capacity, how do i go about determining the final temperature of the coffee when the milk is added?
I'm just looking for the relevant equations to use really rather than being given the answer
2007-08-12 22:11:44 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Its ok... I've sorted it
2007-08-12 22:34:45 · update #1
As a first approximation assume temp. will settle at some 'mid point' determined by the ratio of milk & coffee ... (both are liquids containing water ... so heat capicity is similar and anyway losses from evaporation, radiation, conduction & convection will far outweigh any small capacity differences)
For example, 1 pint of coffee at 80 degrees, add 1 pint of milk at 20 degrees ... ratio is 1:1, so temp will settle half way between 80 and 20 = 50 degrees.
If milk was only 0.1 pint, then ratio is 10:1 and approx temp. will be 74.5 degrees (20 + 10 x (80-20)/11 )
Anyway, what's this got to do with Astronomy ???
2007-08-12 23:01:44 · answer #1 · answered by Steve B 7 · 0⤊ 0⤋
Depends where u are...in the tropics or in the cold artic
2007-08-13 06:52:43 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Just dont boil the water!!
2007-08-13 06:23:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋