1.

Given the following information : A^(-)(g) rarr A^(2+) (g) + 3e^(-) DeltaH_(1) = 1400 KJ//"mole" A (g) rarr A^(2+) (g) + 2e^(-) DeltaH_(2) = 700 KJ//"mole" DeltaH_(eg) [A^(+)(g)] = -350 KJ//"mole" IE_(1) + IE_(2) for A (g) = 950 KJ//"mole" The value of IE_(1) of A^(-) in KJ/mol is :

Answer»

450
`+350`
`+600`
`+ 250`

SOLUTION :`{:(A^(-)(G)rarrA(g)+e,,DeltaH_(eg)=-350 "kJ/mole"),(A^(+)(g)+e^(-)rarrA,,):}`
`{:(A^(-)rarrA+e^(-)),(ArarrA^(+)+e^(-)),(A^(+)rarrA^(+2)+e^(-)):}}1400 "kJ/mole"....("i")`
`{:(ArarrA^(+)+e^(-)),(A^(+)rarrA^(+2)+e^(-)):}}IE_(1)+IE_(2) "of" A = 950 "kJ/mole" ....("ii")`
Comparing (i) and (ii)
`A^(-)rarrA+e^(-)rArr 450 "kJ/mole"`


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