a cup contains 100 ml of water at 10°c

Physics
Tutor: None Selected Time limit: 1 Day

if 300ml of 50°c is added what will the temperature of the mixture be

Oct 1st, 2014

Let final temperature = t °c

Then heat changes of 2 constituents at beginning  = heat capacity at end after addition

           100(t-10) + 300(50 -t)   = 400t

           100t -1000 + 15000 -300t = 400t

           -200t + 14000            = 400t

                   14000    = 600t

                    600t    = 14000

                       t    = 14000/600

                       t    =  23.33

So temperature of the mixture = 23.33  °c              


Oct 1st, 2014

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