1.

The heat of sublimation of iodine is 24 cal g^(-1)at 50°C. If specific heat of solid iodine and its vapour are 0.055 and 0.031 cal g^(-1)respectively Calculate the heat of sublimation of iodine at 100°C.

Answer»


Solution :`DeltaH_(2) - DeltaH_(1) = DeltaC_(p)(T_(2)-T_(1))`
`DeltaH_(2) -24 =(0.031 -0.055)(100-50)`
`RARR DeltaH_(2)=22.8 CAL g^(-1)`


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