# Science

In Glogpedia

Last updated 5 years ago

Discipline:
Science
Subject:
Physics

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1st LawThe first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems. The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from one form to another, but cannot be created or destroyed.2nd LawThe Second Law of Thermodynamics states that the state of entropy of the entire universe, as a closed isolated system, will always increase over time. The second law also states that the changes in the entropy in the universe can never be negative.3rd LawThe third law of thermodynamics states that the entropy of a system at absolute zero is a well-defined constant. This is because a system at zero temperature exists in its ground state, so that its entropy is determined only by the degeneracy of the ground state.

Three Laws of Thermodynamics

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Thermodynamics: Is a branch of physics concerned with heat and temperature and their relation to energy and work.Absolute Zero: Precisely zero on the kelvin scale.Entropy: a thermodynamic quantity representing the unavailability of a system's thermal energy for conversion into mechanical work.Tempature: the degree or intensity of heat present inthe emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization. a substance or object.Heat: The higher the temperature of a material, the faster the atoms are moving, and hence the greater the amount of energy present.Calorie: the energy needed to raise the temperature of 1 gram of water through 1 °C (now usually defined as 4.1868 joules).Energy: The ability to do work.Potential Energy: The energy of a body or a system with respect to the position of the body or the arrangement of the particles of the system. Kinetic Energy: The energy of a body or a system with respect to the motion of the body or of the particles in the system.Exothermic: noting or pertaining to a chemical change that is accompanied by a liberation of heat.Endothermic: noting or pertaining to a chemical change that is accompanied by an absorption of heatnoting or pertaining to a chemical change that is accompanied by an absorption of heat.Thermal Expansion: The tendency of matter to change in volume in response to a change in temperature, through heat transfer. Thermal Contraction: Materials expand or contract when subjected to changes in temperature. Radation: the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.Convection: the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.Conduction: the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.

3rd Law Below