Question

150 gram of water at 100˚c is mixed with 50 gram of water at 20˚c . If there is no heat lost to the surroundings ,now i want the temperature after mixing the two quantities, and the explanation if you please.

Answer 1

80 degrees
The water has the same specific heat if it hasn't begun to boil yet.
75% 100 degree water and 25% 20 degree water
75+5 -> 80

Answer 2

Dear Kslynno:
I'm so happy you have replied to me, But I still do not understand the relation, and where did you get the "5" from?!!

Answer 3

Total volume of 200grams of water
75% of it is 100 degrees, 25% of it is 20 degrees

75% of the 100 and 25% of the 20 degrees are the 75 and 5

Answer 4

Thanks for Explaining!