if i mix 40 gallons of 50 degree water and 40 gallons of 80 deg. water, does that make it 65 degrees?

Question

i’m just wondering how fluid & heat transfer works, if you mix water that is 20 or 30 degrees apart in temperature does the hot or cold have an advantage or does it meet in the middle and equalize?

In: 6

Answer 1

If you ignore the escaping heat or doing it in a very insulated container than the answer is yes it will be 65. Just multiply the degree with the mass, and divide it by total mass, which in this occasion is equal for both temperatures so just add the temperatures and divide by 2.