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A block made of cobalt with a mass of 0.80 kg is heated to 850°C, then...

A block made of cobalt with a mass of 0.80 kg is heated to 850°C, then dropped into 5.00 kg of water at 10°C. What is the total change in entropy (in J/K) of the block-water system, assuming no energy is lost by heat from this system to the surroundings? The specific heat of cobalt is 420 J/(kg · K), and the specific heat of water is 4,186 J/(kg · K). (Hint: note that

dQ = mcdT.)

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Answer #1

use the given formulae of entropy.

First calculate the final speed temperature of he block and water system.

Then find entropy.

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