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NTA Abhyas NEET2020ChemistryClassification of Elements and Periodicity in PropertiesPractice

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.

Options

  1. A4.80 kCal
  2. B5.20 kCal
  3. C1.50 kCal
  4. D3.60 kCal

Correct answer

A. 4.80 kCal

Step-by-step solution

Moles of Cl(g)= 2 3 5 · 5 = 0.0563 mole Energy Released, = 0. 0 5 6 3 × 3.7 × 96.5 = 20.10 kJ = 20.10 4. 1 8 4 = 4.80 kCal

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