What is the reaction of liquid when it changes to a solid state?

Answer 1

Many solids react readily with reactive gas species like chlorine, iodine, oxygen etc. Others form adducts with other gases, e.g. CO or ethylene. Such reactions are often carried out in a tube that is open ended on both sides and through which the gas is passed. A variation of this is to let the reaction take place inside a measuring device such as a TGA. In that case stoichiometric information can be obtained during the reaction, which helps identify the products.

A special case of a gas reaction is a chemical transport reaction. These are often carried out in a sealed ampoule to with a small amount of a transport agent, e.g. iodine is added. The ampoule is then placed in a zone oven. This is essentially two tube ovens attached to each other which allows a temperature gradient to be imposed. Such a method can be used to obtain the product in the form of single crystals suitable for structure determination by X-ray diffraction.

Chemical vapor deposition is a high temperature method that is widely employed for the preparation of coatings and semiconductors from molecular precursors.

Answer 2

When a liquid changes to a solid state, it undergoes a process known as solidification or freezing. The particles in the liquid slow down and come closer together, forming a more ordered and rigid structure characteristic of solids. This process releases heat energy, which is why freezing often results in the release of heat.

Answer 3

change from liquid to a solid is an exothermic reaction. in exothermic reaction heat energy gives off.