What will be the equilibrium temperature when a 245 g block of copper at 285 oC

is placed in a 145 g aluminum calorimeter cup containing 825 g of water at 12.0 oC?

1 answer

add the changes in heat, they have to equal zero.

masscopper*ccu*(Tf-285)+massal*cal*(tf-12)+masswater*cwater*(tf-12)=0

solve for Tf