Question

Solid compound X has two components (A and B). After heating the solid powder, one component (A) is left and B formed gas directly. Comment on the nature of A and B and the process of phase change that resulted in the evaporation of B.

Answer 1

Solid mixture X contains A and B components. If you heat the X then B component converts to gas directly,

"Any component which can convert directly from solid to gas is called sublimation process."

So component B undergone sublimation process since the attraction foces between the atoms/molecules present in component B are weak compared to A component so it converted to gas phase easily.

The phase change for component B is from Solid -----> Gas.

The component A remains as solid even after heating so it is rigid compound and it has strong attractions between the atoms/molecules present in the component A.