[" The process that is NOT endothermic in "],[" nature is : "],[" (B) "Ar(g)+e^(-)rarr Ar^(-)(g)],[" (C) "Na(g)rarr Na^(+)(g)+e^(-)]

[" Find exothermic reaction : "],[" (1) "F_((g))^(-)rarr F_((g))+e^(-)],[" (2) "Be_((g))+e^(-)rarr Be_((g))^(-)],[" (3) "O_((g))+e^(-)rarr O_((g))^(-)],[" (4) "O_((g))+2e^(-)rarr O_((g))^(2-)]

Which one of the following processes proceeds with the absorption of energy? F(g)+e^(-) rarr F^(-) (g) , F(g)+e^(-) rarr F^(-) (g) , O(g)+e^(-) rarr O^(-)(g) , Cl(g)+e^(-) rarr Cl^(-) (g)

Identify the type of energy change (ionization energy, energy of atomization, etc) show by each of these steps in the Born Haber cycle for potassium chloride. State with a reason whether the step is exothermic or endothermic. a ) 1//2 CI_(2)(g) rarr CI(g) " " b) CI(g) rarr CI^(-)(g) " " c) K(s) rarr K (g) d) K(g) rarr K^(+) (g) + e^(-) " " e) K (s) +1//2 CI_(2) (g) rarr KCI (s) " " f) KCI (s) rarr K^(+) (g) + CI^(-) (g)

Which terms are exothermic for the formation of NaF(s) ? (P) Na(g) rarr Na^(+) (g)+e^(-) (Q) F(g)+e^(-) rarr F^(-)(g) (R) Na^(+)(g)+F^(-)(g) rarr NaF(s)

In which of the following process maximum energy is released A) S_((g))+e^(-) rarr S_((g))^(-) B) O_((g))^(-) +e^(-) rarr O_((g))^(-2) C) S_((g))^(-)+e^(-) rarr S_((g))^(-2)

Process Na_((g))^(2+) overset(I)rarr Na_((g))^(+) overset(II)rarr Na_((g))

The formation of the oxide ion O_(g)^(2-) requires first an exothermic and then an endothermic step as shown below: O_(g)+e^(-) rarr O_(g)^(-) , DeltaH=-142 kJ mol^(-1) O(g)+e rarr O_(g)^(2-) , DeltaH=844kJ mol^(-1) This is because:

The formation of the oxide ion O_(g)^(2-) requires first an exothermic and then an endothermic step as shown below: O_(g)+e^(-) rarr O_(g)^(-) , DeltaH=-142 kJ mol^(-1) O(g)+e rarr O_(g)^(2-) , DeltaH=844kJ mol^(-1) This is because:

Designate the following changes as exothermic or endothermic: (1) A(g)to A^(+)(g)+e^(-) (2) B(g)+e to B^(-)(g) (3) X(s) toX(g) (4) A^(+)(g)+B^(-)(g) to AB