What is it called when a gas turns into a solid?
Deposition is a thermodynamic process, a phase transition in which gas transforms into solid without passing through the liquid phase. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation. This causes the water vapor to change directly into a solid.
Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. The following figure illustrates the microscopic differences.
- The seven states of matter explained
- Solid, liquid and gas – these are the physical states most people know.
- Bose-Einstein condensate: a state of matter that occurs very close to absolute zero.
- Quark-gluon plasma: the state of matter with the highest energy level.
- Of the many molecules and compounds coming out of the tailpipe, the EPA is primarily concerned with five of them:
- Hydrocarbons (HC)
- Carbon Monoxide (CO)
- Oxides of Nitrogen (NOx)
- Carbon Dioxide (CO2)
- Oxygen (O2)
- Here is a look at the main types of solids:
- Ionic Solids. Ionic solids form when electrostatic attraction sticks together anions and cations to form a crystal lattice.
- Metallic Solids.
- Network Atomic Solids.
- Atomic Solids.
- Molecular Solids.
- Amorphous Solids.
All matter exists as solids, liquids, or gases. These are called the states of matter. Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING.
- Changes of state are physical changes in matter. They are reversible changes that do not involve changes in matter's chemical makeup or chemical properties. Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization.
- Sometimes a liquid wants to become a solid. Scientists use something called a freezing point or melting point to measure the temperature at which a liquid turns into a solid. There are physical effects that can change the melting point. Pressure is one of those effects.
- The process of adding heat to an object can cause a reaction, which is an endothermic reaction. Melting ice will turn to water, and then, eventually, steam. H2O(s) + Heat kJ H2O(l) Exothermic reactions exude energy in the form of heat. An example of this is: freezing water.
Examples of solids are common table salt, table sugar, water ice, frozen carbon dioxide (dry ice), glass, rock, most metals, and wood. When a solid is heated, the atoms or molecules gain kinetic energy .
- Liquids are denser than gases. Some examples of liquids are honey, water, milk are some of the examples. Gases have the lowest density amongst the three physical states of matter. Carbondioxide, nitrogen, oxygen etc are some of the examples for gases.
- Because most gases are difficult to observe directly, they are described through the use of four physical properties or macroscopic characteristics: pressure, volume, number of particles (chemists group them by moles) and temperature.
- Since honey normally exists below its melting point, it is a supercooled liquid. At very low temperatures, honey does not freeze solid. Instead, as the temperatures become lower, the viscosity of honey increases. Like most viscous liquids, the honey becomes thick and sluggish with decreasing temperature.
Updated: 17th October 2019