Factory pattern should be used when: - a framework delegate the creation of objects derived from a common superclass to the factory - we need flexibility in adding new types of objects that must be created by the class. Along with singleton pattern the factory is one of the most used patterns.
In thermodynamics, the term exothermic process (exo- : outside) describes a process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e.g. a battery), or sound (e.g. explosion heard when burning hydrogen).
The free energy change in an exergonic reaction always has a negative sign, indicating that there is a net release of energy and that the reaction is spontaneous. Processes that are isothermal and isobaric use Gibbâs free energy, while processes that are isothermal and isovolumetric use Helmholtz free energy.