(a)
Interpretation:
Enthalpy of formation of Calcium chloride has to be calculated by using Born-Haber cycle.
Concept Introduction:
Born-Haber cycle:
The enthalpy of formation of ionic crystals are calculated by addition of enthalpies of atomization, ionization, affinity and lattice enthalpy, it is given by Born-Haber so it is called as Born-Haber cycle.
(a)
Explanation of Solution
Enthalpy of formation of Calcium chloride is calculated as,
Hence, the enthalpy of formation of Calcium chloride is
(b)
Interpretation:
The enthalpy change of
Concept Introduction:
Hess's Law:
The enthalpy change of given reaction is calculated by subtraction of sum of enthalpy of formation reactants from sum of enthalpy of formation reactant products.
(b)
Explanation of Solution
The enthalpy change of given reaction is calculated as,
Substitute the standard and calculated values in below equation to get enthalpy change of given reaction.
Hence, the enthalpy change of given reaction is
(c)
Interpretation:
Reason for the stability of is
Concept Introduction:
Refer part (a).
(c)
Explanation of Solution
In part (b), is
The stability is higher from the lower energy product so
Hence, the
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Chapter 5 Solutions
Chemistry: The Molecular Science
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