A copper container of mass 84 g contains 84 g of water at 10 °C.46 g of water at 100 °C is mixed with the water in the copper container. What is the final temperature of the water?
(Specific heat capacity of water
= 4 200 J kg- °C, specific heat
capacity of copper = 400 J kg-1 °C-))
A 10 °C
30 °C
B 20 °C
D 40 °C
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