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Enthalpy of sublimation of iodine is

Question:

Enthalpy of sublimation of iodine is $24 \mathrm{cal} \mathrm{g}^{-1}$ at $200^{\circ} \mathrm{C}$. If specific heat of $\mathrm{I}_{2}(\mathrm{~s})$ and $\mathrm{I}_{2}$ (vap) are $0.055$ and $0.031 \mathrm{cal} \mathrm{} \mathrm{g}^{-1} \mathrm{~K}^{-1}$ respectively, then enthalpy of sublimation of iodine at $250^{\circ} \mathrm{C}$ in cal $g^{-1}$ is :

  1. $2.85$

  2. $11.4$

  3. $5.7$

  4. $22.8$


Correct Option: , 4

Solution:

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