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JEE Advanced levelSingle correct optionDifficulty 3 of 3pt161

Sulfur has first and second electron gain enthalpies of and respectively. For the process with 3.2 g of atoms ( = 32), the energy change is

  1. A84 kJ released
  2. B44 kJ released
  3. C440 kJ released
  4. D44 kJ absorbed

Answer: D

Per mole: -200 + 640 = +440 kJ (net endothermic). Moles = 3.2/32 = 0.10, so energy = 0.10 x 440 = 44 kJ absorbed.
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