If a 1g of iodine(s) where to be placed in a large evacuated container, it would form some I2(g), till it reaches, let's say, 0.2 atm. Let's pretend
the equilibrium pressure for I2(g) is 1.0 atm. Its impossible for 100% the solid to vaporize, so there will be a VERY small amount of solid left.
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