Chemistry
posted by Brittney .
A 110.g sample of copper (specific heat capacity = 0.20 J/°C · g) is heated to 82.4°C and then placed in a container of water at 22.3°C. The final temperature of the water and copper is 23.5°C. What is the mass of the water in the container, assuming that all the heat lost by the copper is gained by the water?

[nass Cu x specific heat Cu x (TfinalTinitial)] + [mass H2O x specific heat H2O x (TfinalTinitial)] = 0
Solve for mass H2O.
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