2the ionization energy of lithium is 5202 kjmole and the electron affinity of hydrogen is 728 kj

(a) The energy cost of removing an electron from Li and adding it to H is the sum of the ionizat

2the ionization energy of lithium is 5202 kjmole and the...

2. The ionization energy of lithium is 520.2 kJ/mol, and the electron affinity of hydrogen is 72.8 kJ/mol. (a) Find the separation distance in LiH at which the Coulomb potential energy equals the energy cost of removing an electron from Li and adding it to H. (b) The measured electric dipole moment of the molecule LiH is 2.00 × 10^(-29) C · m. What is the fractional ionic character of LiH? (c) Instead of removing an electron from Li and attaching it to H, we could regard the formation of LiH as occurring by removing an electron from H and attaching it to Li (electron affinity = 59.6 kJ/mol). Why don't we consider this as the formation process?

Transcript

00:01 Hello students here in this question first we have to find out the separation distance is lithium hydrate the energy of lithium hydrate and from the electron affinity of the hydrogen we can find its energy it is 447 .4 kilojord and we have to know that one mole of lithium hydrate of 447 .4 divided by any that is the energy value here is 7 .4 4 to 8 into 10 days to minus 19 june and when we consider is potential energy it can be written as minus k into their charges divided by separation as we found out the energy here we have to find out the value of 1 that will be equal to the k value here is representing 9 to 9 and the q1 charges will be for that of the lithium ion and that of the hydrate ion will be equal to 1 .6 into 10 -2 minus -90 for the lithium for that of the hydrate it is equal to same as that of this that is but the negative sentence is negative 1 .6 into 10 -drease to minus 19 divided by the potential energy value we got a 7 .428 into 10 -2 minus 90.

01:27 So i'm doing this here we will get the separation of distance between the tpm hydrate that is equal to 3 .10122 into 10 days to minus 10 meter.

01:40 Then in the next question we have to find out the fractional ionic character which is can be founded by dividing the observed dipole moment by calculated eyeball moment here so here we can find out the fractional ionic character that will be equal to observe type of moment.

01:58 Here, the observed type of moment is given as 2 into 10 raised to minus 29.

02:04 That has to be divided by the calculated 1.

02:08 That will be equal to 3 .1012 into 10 raise to minus 10.

02:16 That is the charge separation into its charge, that is 1 .69 into 10 to minus 19...

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