mass of copper = 45.1 g
temperature = 58.5 oC
mass of water = 50 g
temperature = 25 oC
here
heat loss by copper = heat gain by water
(m Cp dT)Cu = (m Cp dT) water
45.1 x 0.385 x (58.5 - Tf) = 50 x 4.184 x (Tf - 25)
0.083 (58.5 - Tf) = (Tf - 25)
4.855 - 0.083 Tf = Tf - 25
Tf = 27.57
final temperature Tf = 27.6 oC
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