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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`.

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`K to K^(+)+e " "Delta E_(1)=4.3 eV`
`F + e to F ^(-)" "Delta F _(2) =- E eV`
`(19.0)/(23.06) = Delta E_(1) - Detla E_(2) =4.3 -E`
`0.82 = 4.3 - E implies E= 3.48`
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MOTION-PERIODIC TABLE -Exercise - 4 | Level-II
  1. For the gaseous reaction K + F rarr K^(+) +F^(-), Deltah was calculate...

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  2. Moving from right to left in a periodic table, the atomic size is :

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  3. The increasing order of electronegativity in the following elements :

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  4. One element has atomic weight 39. Its electronic configuration 1s^(2) ...

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  5. Number of paired electrons in O(2) molecule is .

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  6. The decreasing size of K^(+) , Ca^(2+) , Cl^(-) & S^(2-) follows the o...

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  7. Which of the following oxide is neutral ?

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  8. Which of the following has the maximum number of unpaired electrons ?

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  9. The following acids have been arranged in order of decreasing acid str...

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  10. The incorrect statement among the following is : (A)

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  11. Which of the following are amphoteric ?

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  12. Li^(+),Mg^(2+),K^(+),Al^(3+) (Arrange in increasing order of radii)

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  13. Anhydrous AlCl(3) is covalent . From the data given below predict whet...

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  14. Which one of the following statement (s) is (are) correct ? (A) Th...

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  15. Statement-1 : F arom has a less negative electron gain enthalpy than C...

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  16. Al(OH)(3) is amphoteric is nature. Al-O and O-H bonds can be borken ...

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  17. The correct order of radii is

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  18. The correct order of acidic strength is

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  19. The IE(1) of Be is greater than that of B. [T/F]

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  20. The set representing correct order of IP(1) is

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  21. Identify the least stable ion amongst the following:

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