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For the gaseous reaction K + F rarr K^(+...

For the gaseous reaction `K + F rarr K^(+) +F^(-), Deltah` was calculated to be `18.4` kcal/mol under conditions where the cations and anions were preverted from combining with each other. The ionisation enthalpy of `K` is 4.3 eV/atom. What is the electron gain enthalpy of F (in eV)? If your answer is `x` report it as `-2x`.

A

`2.33 eV `

B

`3.48 eV `

C

`5.55 eV `

D

`7.03 eV `

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The correct Answer is:
B
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