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AP EAMCET201921 Apr 2019Evening ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

The electron gain enthalpy Δ eg H of Cl ( g ) is - 349 kJ mol - 1 . If the ground state energy of Cl ( g ) is x kJ mol - 1 , the ground state energy in kJ mol - 1 of Cl - ( g ) is

Options

  1. Ax + 349
  2. Bx
  3. Cx - 349
  4. Dx - 349 17

Correct answer

C. x - 349

Step-by-step solution

C l 2 → ∆ e g H   2 C l - +   2 e - As ground state energy is   x   k J   m o l e - 1 , x = ∆ E g r o u n d   s t a t e   -   ∆ e g H ∆ E g r o u n d   s t a t e = x + ∆ e g H ∆ E g r o u n d   s t a t e = x - 349

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