Question

The process in which a solid is converted directly into a gas is called sublimation
lodine is an element that sublimes. A sample of solid iodine in s stoppered flask
was allowed to stand undisturbed for several days. Crystals of solid iodine grew
on the sides of the flask.Explain at the molecular level what happened?​

Answer 1

Answer:

The process in which a solid is directly converted into a gas is called sublimation. Sublimation process occurs at very low temperature and low pressure in the presence of dry ice. Iodine atoms are closely packed with each other with the help of covalent bond. Weak van der waals force exists between the molecules. When the iodine crystals are heated and van der waals force is break down resulting the molecule into gas phase. These gaseous molecules sublime to form a dense purple color vapor. Forensic science utilizes the process of iodine sublimation in finger print detection.

Answer 2

Iodine provides an excellent example of sublimation. When iodine sublimes it forms a visible purple gas. When the gas cools it returns directly to the solid phase, an example of deposition