A phase change, also known as a phase transition, is a transformation in the physical state of a certain sample of matter. The phrase is most commonly used to describe the transition of a material between solid, liquid, gaseous and plasma states.
These phase changes are transitions in the thermodynamic states of matter propelled by changes in temperature and pressure. The most easily identified example of a material undergoing phase change is a block of ice melting into water and subsequently evaporating as steam while temperature rises. Different materials have different points of temperature or pressure at which they will undergo a phase change. For water, the point at which the solid form is differentiated from liquid is 32 degrees Fahrenheit.Learn More
The five phase changes of matter are solids, liquids, gases, plasmas and Bose-Einstein condensates. Elements are able to move between these phases when certain physical conditions exist.Full Answer >
The normal phase of silicon is a solid at room temperature. It has a melting point of 1410 degrees Celsius. Silicon exists in two solid forms, one crystalline and the other amorphous. It is a nonmetal.Full Answer >
Phase equilibrium is the state of balance between two phases of a molecule. It occurs when the transfer of matter or heat energy from one phase to another phase is equal to the rate of transfer of matter or heat energy in the reverse direction.Full Answer >
Sublimation, when a solid transforms into a gas, is an endothermic phrase change, while deposition, when a gas transforms to a solid, is an exothermic phase change. There are a total of six phase changes in matter, and three are endothermic and three are exothermic. An endothermic phase change absorbs heat or energy, while an exothermic phase change releases heat or energy, states the Washington University Department of Chemistry.Full Answer >