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11 February, 04:15

A calorimeter contains 500 g of water at 25°C. You place a hand warmer containing 100 g of liquid sodium acetate (NaAC) inside the calorimeter. When the sodium acetate finishes crystallizing, the temperature of the water inside the calorimeter is 32.2°C. The specific heat of water is

4.18 J/g-°C. What is the enthalpy of fusion (ΔHf) of the sodium acetate? Show your work.

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  1. 11 February, 04:38
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    The heat absorbed by the water is

    Q = 500 (4.18) (32.2 - 25)

    Q = 15048 J

    The enthalpy of fusion of the sodium acetate is:

    ΔHf = Q / m

    ΔHf = 15048 / 100

    ΔHf = 150.48 J/g
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