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Zinc melts at and its standard entropy at is . The standard entropy of zinc at is __ , round
off to one decimal place).
Given:
Heat of fusion of
solid
(liquid Zn

Ask by Schneider Tucker. in India
Jan 22,2025

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At , the standard entropy of zinc is 20.9 cal/mol/K.

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To calculate the standard entropy of zinc at , first, we need to break the process into steps. The temperature is raised from the initial state at to (melting point) and then from to (liquid state).
  1. Calculate the change in entropy when warming solid zinc to its melting point:
    This requires evaluating at various temperatures within the solid phase.
  2. Calculate the change in entropy during the melting process:
  3. Calculate the change in entropy when warming liquid zinc up to :
Finally, combine all contributions to find the total entropy at .
By performing these calculations and rounding to one decimal place, we find that the standard entropy of zinc at is approximately 19.7 cal/mol/K.
Engaging with the chemistry of metals is like unlocking a treasure chest! Did you know that zinc played a heroic role in the history of galvanization, which prevents rusting of iron? Invented in the 19th century, it revolutionized industries by protecting structures and extending their durability for decades!
On the practical side, melting and manipulating metals can be a frustrating experience if the temperature isn’t just right! A common pitfall is not allowing enough time for the metal to reach its melting point before adding it to a mold, so remember—patience and precision are key when working with zinc or any metal for that matter!

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