A 400-G Block of Iron At $400 ^ { \circ } \mathrm { C }$

question 24

Multiple Choice

A 400-g block of iron at $400 ^ { \circ } \mathrm { C }$ is dropped into a calorimeter (of negligible heat capacity) containing 60 g of water at $30 ^ { \circ } \mathrm { C }$ How much steam is produced? The latent heat of vaporization of water is $22.6 \times 10 ^ { 5 }$ J/kg and its specific heat capacity is 4186 $\mathrm { J } / \mathrm { Kg } \cdot \mathrm { K }$ The average specific heat of iron over this temperature range is $560 \mathrm {~J} / \mathrm { kg } \cdot \mathrm { K } .$

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

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