Recall that heat can be calculated using the following equation:
• +q → absorbs heat
• –q → loses heat
heat lost by the Copper, Cu block = heat absorbed by water
– qCu = + qwater
At thermal equilibrium:
▪ final temperature of copper = final temperature of water = final temperature of system
A block of copper of unknown mass has an initial temperature of 65.1 oC. The copper is immersed in a beaker containing 95.1 g of water at 22.8 oC. When the two substances reach thermal equilibrium, the final temperature is 24.6 oC. What is the mass of the copper block? Assume that Cs, H2O = 4.18 J/(g ) and Cs, Cu = 0.385 J/(g ).
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