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Electric Conduction of Ionic Compounds

21. The e.a o...

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21. The e.a of cl is 3.7 eV. How much energy in kcal is released when 2g of cl is completely converted to chloride ion in a gaseous state? (1 eV= 23.06 kcal/ mole)

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Q. The electron affinity of chlorine is

3.7

1

gram of chlorine is completely converted to

C l^{-}

ion in a gaseous state. (

1

= 23.06

m o l^{- 1}

). Energy released in the process is:

Q. The electron affinity of chlorine is

3.7 e V

. How much energy (nearest integer value) in

k c a l

is released when

2 g

of chlorine is completely converted to

{C l}^{-}

ion in a gaseous state?

(1 e V = 23.06 k c a l

{m o l}^{- 1})

Q. The electron affinity of chlorine is

+ 37 e V

. How much energy in

k J

is released when

3.55 g

of chlorine is converted completely into

C l

ion in the gaseous state .

(1 e V = 96.49 k J / m o l e)

Q. The electron gain enthalpy of chlorine is

3.7 e V

. How much energy in kcal is released when

2 g

of chlorine is completely converted to

{C l}^{-}

ions in the gaseous state?
(

1 e V = 23.06 k c a l

)

Q. The amount of energy released when

10^{12}

C l

(vapour) are converted to

C l^{-}

ions, according to the equation:

C l_{(g)} + e^{-} \to C l_{(g)}^{-} is 58 \times 10^{- 10} J

Δ_{e g} H^{-}

C l

{eV atom}^{- 1}

.

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