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Electron Affinity of Cl is 3.7 eV. How m...

Electron Affinity of Cl is 3.7 eV. How much Energy released in kCal when 2g of gaseous chlorine atoms is converted to cl ions in the gaseous state.

A

4.80 kcal

B

5.20 kcal

C

1.50 kcal

D

3.60 kcal

Text Solution

Verified by Experts

The correct Answer is:
A
Moles of Cl(g)=`(2)/( 33.5)` = 0.0563 mole
Energy Released,
1 ev /atom = 96.5 kJ / mole
`= 0.0563 xx 3.7 xx 96.5 = 20.10 kJ`
`= (20.10)/(4.184) = 4.80 `kCal
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NTA MOCK TESTS-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES TEST -SINGLE CHOICE
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