Problem: List the individual steps used in constructing a Born - Haber cycle for the formation of BaI2 from the elements. Which of the steps would you expect to be exothermic?Write chemical equation for fourth step of a Born - Haber cycle.

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We’re being asked to determine the exothermic step and write the chemical equation for the fourth step of a Born-Haber cycle for the formation of BaI2 from its the elements.


The Born-Haber cycle is an approach to analyze reaction energies. The cycle is concerned with the formation of an ionic compound from the reaction of a metal (often a Group 1A or Group 2A element) with a halogen or other non-metallic element.


The steps involved in the formation of an ionic compound from its metal element and nonmetal element stable form are

Step 1Sublimation of the metal into its gaseous form.

Step 2: Ionization of the metal to its ion

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Problem Details

List the individual steps used in constructing a Born - Haber cycle for the formation of BaI2 from the elements. Which of the steps would you expect to be exothermic?

Write chemical equation for fourth step of a Born - Haber cycle.