A 0.750-kg iron bar is taken from a forge at 900 $\circ$ C and dropped into 14.00 kg of water at 20.0 $\circ$ 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 water.Assume that specific heat of iron is 448 J/(kg.K).

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Quizplus · Accepted Answer

The total entropy change is calculated using the formula ΔS = m*c*ln(Tf/Ti) for both the iron and the water. The final temperature can be found using energy conservation, and then the entropy change for the water is calculated.

A 0750-Kg Iron Bar Is Taken from a Forge at 900