Home
Class 11
CHEMISTRY
For the gaseous reaction K+F rarrK^(o+...

For the gaseous reaction
`K+F rarrK^(o+)+F^(ɵ)`
`Delta H = 19 kcal mol^(-1)` under the condition when cations and anions are prevented by electrostatic separation from combining with each other. The `IE_(1)` of `K` is `4.3 eV`. Calculate `Delta_("eg")H^(ɵ)` of `F`.

Text Solution

Verified by Experts

The correct Answer is:
`[3.467 eV]`
`[1eV = 23 Kcal//mol DeltaH = I_(E) +E_(A), E.A = 347eV]`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

For the gaseous reaction , K_((g)) + F_((g)) to K^(+) + F^(-) , DeltaH was calculated to be 19 kcal under conditions where the cations and anions were prevented by electrosatic separation from combining with each other. The ionisation potential of K is 4.3 eV. What is the electron affinity of F ?

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 .

For the reaction K(g)+F(g) +K^(o+)+F^(Theta) (separated ions DeltaH = 19 kcal mol^(-1) ), if the ionisation potential of K and the electron affinity of F^(Theta) have a geometric means of 3.88eV and IP gt EA , calculate the values fo ionisation potential and electron affinity.

Delta_(f)H(H_(2)O) =- 68 kcal mol^(-1) and DeltaH of neutralisation is -13.7 kcal mol^(-1) , then the heat of formation of overset(Theta)OH is

Answer the following question (Based on EA, Delta_(eg)H^(ɵ) and IE ). (a) IE_(1) of Li is 5.4 eV "atom"^(-1) and the EA of Cl is 3.6 eV "atom"^(-1) . Calculate Delta_( r)H^(ɵ) in "kcal mol"^(-1) and kJ mol^(-1) for the reaction Li_((g))+Cl_((g)) rarr Li_((g))^(o+)+Cl_((g))^(ɵ) formed at such a low pressure that resulting ions do not combine with each other. (b) The IE of atoms X and Y are 400 and 300 kcal mol^(-1) respectively. EA's of these atoms are 80.0 and 85.0 K cal mol^(-1) . Explain as which of the atoms has higher EN . ( c) Explain why EA of S is -200 kJ mol^(-1) but the second EA is +649 kJ mol^(-1) ? (d) Which of the following pairs of elements would have more negative electron gain enthalpy (Delta_("eg")H^(ɵ)) ? (i) F or Cl , (ii) O or F (e) What would be the second electron gain enthalpy (Delta_(eg)H_(2)^(ɵ)) of oxygen as positive, more negative or less negative than first (Delta_(eg)H_(1)^(ɵ)) ? Explain. (f) Which has less negative Delta_(eg)H^(ɵ) oxygen or sulphur?

The Delta_(eg)H^(ɵ) of Br is 3.4 eV . How much energy in kcal is released when 0.8 g of Br (g) is completely converted to Br^(ɵ) (g) ions. (1 eV = 23.06 kcal mol^(1-)) b. The energy released when 10^(7) atoms of I (g) is converted to I^(ɵ) (g) ions, is 5 xx 10^(-13) J . Calculate Delta_(eg)H^(ɵ) of I (g) in (i) eV "atom"^(-1) and (ii) kJ mol^(-1) .

Delta_(f) H of graphite is 0.23 kJ mol^(-1) and Delta_(f) H of diamond is 1.896 kh mol^(-1) . Delta H_(transition) from graphite to diamond is

BANSAL-PERIODIC TABLE-EXERCISE-3
  1. Compare the following giving reasons Acidic nature of oxides: CaO, CO,...

    Text Solution

    |

  2. The ionisation potentials of atoms A and B are 400 and 300 kcal mol^(-...

    Text Solution

    |

  3. If internuclear distance between CI atoms in CI(2) is 10Å & between H ...

    Text Solution

    |

  4. The As-CI bond distance in AsCI(3) is 2.20 Å. Estimate the SBCR (singl...

    Text Solution

    |

  5. The Pt-CI distance is 2.32 A in several crystaline compounds What is...

    Text Solution

    |

  6. The IE values of Al((g)) = Al^(+) +e is 577.5 kJ mol^(-) and DeltaH fo...

    Text Solution

    |

  7. For the gaseous reaction K+F rarrK^(o+)+F^(ɵ) Delta H = 19 kcal mo...

    Text Solution

    |

  8. Calculate E.N. of chlorine atom on Pauling scale if I.E. of CI^(-) is ...

    Text Solution

    |

  9. Calculate the electronegativity of fluorine from the following data: ...

    Text Solution

    |

  10. Calculate the E.N. of CI from the bond energy of CIF (61 K Cal//"mol")...

    Text Solution

    |

  11. How many chlorine atoms will be ionised CI rarr CI^(+) +e^(-1) by the ...

    Text Solution

    |

  12. A mixture contains F and Cl atoms . The removal of an electron form e...

    Text Solution

    |

  13. Calculate the lattice energy of NaCI crystal from the following data b...

    Text Solution

    |

  14. Calculate the electron affinity of iodine with the help of the followi...

    Text Solution

    |

  15. The lattice enthalpy of solid NaCI is 772 kJ mol^(-1) and enthalpy of ...

    Text Solution

    |

  16. From the following information {:(A^(-)(g)rarrA^(+2)(g)+3e^(-),Delta...

    Text Solution

    |

  17. For ionic compound A^(2+) 2B^(-) & 2C^(+)D^(2-) (a) A(4)(S) +B(2)(g)...

    Text Solution

    |

  18. Prove that the formation of NaCI(2) is highly endothermic and energeti...

    Text Solution

    |

  19. Given: DeltaH(EG) of A^(+) =- 5x DeltaH(EG) of A^(2+) =- 8x DeltaH...

    Text Solution

    |

  20. What is the maximum number of electron possible in Ni^(+) having same ...

    Text Solution

    |