A 400-G Block of Iron at 400°C Is Dropped into a Calorimeter

question 112

Multiple Choice

A 400-g block of iron at 400°C is dropped into a calorimeter (of negligible heat capacity) containing 60 g of water at 30°C.How much steam is produced? The latent heat of vaporization of water is 22.6 × 10⁵ J/kg and its specific heat is 4186 J/kg ∙ K.The average specific heat of iron over this temperature range is 560 J/kg ∙ K.

• A)22 g
• B)33 g
• C)42 g
• D)54 g
• E)59 g

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