The first ionization energy for Li is 5.4 eV | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The reaction is $Li_{(g)} + Cl_{(g)} 	o Li^{+}_{(g)} + Cl^{-}_{(g)}$.Energy required for ionization of $Li$ is $I.E. = 5.4 \ eV$.Energy released

Vedclass · Accepted Answer

$170$

Vedclass · Answer

(C) The reaction is $Li_{(g)} + Cl_{(g)} 	o Li^{+}_{(g)} + Cl^{-}_{(g)}$.Energy required for ionization of $Li$ is $I.E. = 5.4 \ eV$.Energy released during electron gain by $Cl$ is $E.A. = 3.61 \ eV$.The net enthalpy change $\Delta H$ in $eV$ is $\Delta H = I.E. - E.A. = 5.4 \ eV - 3.61 \ eV = 1.79 \ eV$.To convert this to $kJ/mol$,we use the conversion factor $1 \ eV = 1.602 	imes 10^{-19} \ J$ and multiply by Avogadro's number $N_A = 6.022 	imes 10^{23} \ mol^{-1}$.$\Delta H = 1.79 	imes 1.602 	imes 10^{-19} \ J 	imes 6.022 	imes 10^{23} \ mol^{-1} \approx 172.6 	imes 10^3 \ J/mol \approx 173 \ kJ/mol$.Rounding to the nearest given option,the value is $170 \ kJ/mol$.

Similar Questions

Point out the wrong statement: On moving horizontally from left to right across a period in the periodic table

$(a)$ $Be$ and $Mg$ are alkaline earth metals.
$(b)$ $K^{+}$ has larger radii than $Ca^{2+}$.
$(c)$ All $d$-block elements are transition elements.
$(d)$ $H^{-}$ ion is larger than $F^{-}$.
Incorrect statement is/are

In which of the following arrangements,the sequence does not strictly follow the property indicated against it?

Which of the following is not a periodic property?

Vedclass Test Series

Exam Paper Generator

Online Exam Module