Question

500g of water at 100°c is mixed with 300g of water at 20°c.specific heat capacity of water is 4.2Jg°c.find the final temperature of mixture.

(Physics)

Answer 1

500 (100-T) = 300 (T-20)

does not matter what the stuff is as long as it does not change phase (it was not steam at 100).

Answer 2

70o C