Interpretation: The amount of heat that must be removed from liquid naphthalene at its freezing point to bring about solidification is to be found.
Concept Introduction: The enthalpy of solidification
Answer to Problem 84A
The amount of heat that must be removed from
Explanation of Solution
As fusion and solidification are opposite processes, the numerical value of the enthalpy of solidification is the same as the numerical value of the enthalpy of fusion but opposite in sign.
The enthalpy of solidification of naphthalene at its freezing point is
This means to convert
Amount of naphthalene given =
Moles of naphthalene is found by dividing the given amount of naphthalene by the molecular mass of naphthalene.
Moles of naphthalene given =
For the formation of
Thus, for the formation of
Thus, the amount of heat that must be removed from
Chapter 17 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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