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The heat energy associated with a change in temperature that does not involve a change in phase is given by -msAT where q is heat in joules, mis mass in grams, s is specific heat in joules per gram-degree Celsius, J/(g·°C). and AT is the temperature change in degrees Celsius. The heat energy associated with a change in phase at constant temperature is given by where q is heat in joules, m is mass in grams, and ? H is the enthalpy in joules per gram. Physical constants The constants for H2O are shown here: Specific heat of ice: sice = 2.09 J/(g-o C) Specific heat of liquid water: Swater 4.18 J/(g C) Enthalpy of fusion (H2O(s)?H20(1)). AH,us=334 J/g Enthalpy of vaporization (H20(1)?H20(g)): ??,ap-2250J/g . . . ? Part A How much heat energy, in kilojoules, is required to convert 60.0 g of ice at -18.0 ° C to water at 25.0 Express your answer to three significant figures and include the appropriate units. C View Available Hint(s) ValueUnits

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人.ct te, 22.53.24 2004.-t-622

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