Are any of the techniques described in the background sectio

Are any of the techniques described in the background section a chemical state change? explain your answer? Background techniques to be demonstrated in this laboratory are: 1. sublimation - heating a solid until it passes directly from the solid phase into gaseous phase. 2) extraction - use a solvent to selectively dissolve one or more components from a solid mixture ( a soluble solid can be separated from an insoluble solid). 3) decantation - separates a liquid from an insoluble solid sediment by carefully pouring the liquid from the solid without disturbing the solid. 4) filtration - this separates a solid from a liquid through the use of a porous material as a filter. 5) evaporation - process of heating a mixture in order to drive off, in the form of vapor, a volatile liquid, so as to make the remaining component dry.

Solution

Change of physical state

1. Sublimation : Here solid phase changes to a gaseous state.

2. Extraction : no change of phase. Solid is dissolved to make a solution and later solvent removal to get solid back.

3. Decantation : No phase change. Solid remains as solid.

4. Filtration : No phase change. We are working with solutions only.

5. Evaporation : Phase change from liquid to gaseous state.