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Enthalpy of sublimation of iodine is 24 cal g –1 at 200 °C. If specific heat of I 2 (s) and l 2 (vap) are 0.055 and 0.031 cal g –1 K –1 respectively, then enthalpy of sublimation of iodine at 250°C in cal g –1 is :

  1. 2.85
  2. 22.8
  3. 11.4
  4. 5.7

Correct answer: 22.8

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