The specific heats of iodine vapour and solid are 0.031 and 0.055calK−1g−1 respectively. If heat of sublimation of iodine is 24calg−1 at 200oC, find its value at 250∘C.
A
5.7calg−1
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B
11.4calg−1
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C
22.8calg−1
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D
45.6calg−1
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Solution
The correct option is C22.8calg−1 Solid I2 is converted in I2 vapour,
The reaction will be, I2(s)→I2(g)△H=24calg−1at200oC