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A 29  kg piece of zinc at 68◦C is placed in a container of water. The water...

A 29  kg piece of zinc at 68◦C is placed in a container of water. The water had a mass of 28  kg and a temperature of 20◦C before the zinc was added. The specific heat of zinc and water are 388 J/kg ·◦ C and 4180 J/kg ·◦ C, respectively. What is the final temperature of water and zinc? Answer in units of ◦ C.

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Answer #1

Let the final temperature be t

heat lost by Zinc = heat gained by water

mcT for zinc = mcT for water

29*388*(68- t) = 28*4180*(t - 20)

t = 24.2o C

so the final temperature of water and zinc is 24.2o C

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