A calorimeter contains 500 g of water at 25C. You place a cold pack containing 100 g of crystalline ammonium nitrate inside the calorimeter.
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1.     A calorimeter contains 500 g of water at 25°C. You place a cold pack containing 100

g of crystalline ammonium nitrate inside the calorimeter. When the ammonium nitrate finishes dissolving, the temperature of the water inside the calorimeter is 9.3°C. The specific heat of water is 4.18 J/g-°C. What is the enthalpy of fusion (Hf) of the ammonium nitrate? (Show your work.) Where necessary, use qmHf.

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