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JEE Main 2019 Chemistry question

ChemistryThermodynamicsJEE Main 2019

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

Answer: (B)

Solution

Kirchhoff: 24 + (0.031 − 0.055)(50) = 22.8.

Question ID VK-010149