# Ablock of copper of unknown mass has an initial temperature of 65.4 ∘c. the copper

###### Question:

Ablock of copper of unknown mass has an initial temperature of 65.4 ∘c. the copper is immersed in a beaker containing 95.7 g of water at 22.7 ∘c. when the two substances reach thermal equilibrium, the final temperature is 24.2 ∘c. what is the mass of the copper block?

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