A 100-Kg Iron Bar Is Taken from a Forge at 800

question 10

Multiple Choice

A 1.00-kg iron bar is taken from a forge at 800 ^$\circ$ C and dropped into 20.00 kg of water at 15.0 ^$\circ$ C.Assuming that no energy is lost by heat to the surroundings as the water/iron reaches their final temperature,determine the total entropy change of the iron bar plus-water system.Assume that specific heat of iron is 448 J/(kg.K) .

• A)371 J/K
• B)444 J/K
• C)534 J/K
• D)622 J/K
• E)756 J/K

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