question archive A 100 g object at 80oC is placed in 200 g of water at 20oC

A 100 g object at 80oC is placed in 200 g of water at 20oC

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A 100 g object at 80oC is placed in 200 g of water at 20oC. The system is thermally isolated, reaches an equilibrium temperature of 40oC, and no phase changes occur. What is the object's specific heat? (for water  c = 1cal/goC)

 

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