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A 41.0-g block of copper whose temperature is 580. K is placed in an insulating box...

A 41.0-g block of copper whose temperature is 580. K is placed in an insulating box with a 95.0-g block of lead whose temperature is 170. K. The specific heat of copper is 386 J/(kg·K), and the specific heat of lead is 128 J/(kg·K).
What is the equilibrium temperature of the two-block system? Give your answer in K and do not enter units.

What is the change in the internal energy of the system between the initial state and the equilibrium state? Give your answer in Joules and do not enter units.

What is the change in the entropy of the system? Give the answer in J/K, and do not enter units.

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