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Paradox relating to fate of universe
The heat death paradox, also known as thermodynamic paradox, Clausius' paradox, and Kelvin's paradox, is a reductio ad absurdum argument that uses thermodynamics
Heat_death_paradox
Possible fate of the universe
allowed Kelvin to formulate the heat death paradox, which disproves an infinitely old universe. The idea of heat death stems from the second law of thermodynamics
Heat_death_of_the_universe
Topics referred to by the same term
heat death in Wiktionary, the free dictionary. Heat death may refer to: Heat death of the universe, a proposed cosmological event Heat death paradox,
Heat_death
Logically self-contradictory statement
A paradox is a logically self-contradictory statement or a statement that runs contrary to expectations. It is a statement that, despite apparently valid
Paradox
Argument in astrophysics against the theory of an unchanging universe
Olbers' paradox, also known as the dark night paradox or Olbers and Cheseaux's paradox, is a historical argument in astrophysics and physical cosmology
Olbers'_paradox
List of statements that appear to contradict themselves
Heat death paradox: If the universe were infinitely old, it would be in thermodynamic equilibrium, which contradicts what we observe. Denny's paradox:
List_of_paradoxes
Thermodynamic phase transition energy
Latent heat (also known as latent energy or heat of transformation) is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature
Latent_heat
Philosophical thought experiment
Evolution of biological complexity Heat death of the universe – Possible fate of the universe Heat death paradox – Paradox relating to fate of universe Idealism –
Boltzmann_brain
Thermodynamic quantity
thermodynamics, the heat capacity ratio, also known as the adiabatic index, the ratio of specific heats, or Laplace's coefficient, is the ratio of the heat capacity
Heat_capacity_ratio
Heat required to raise the temperature of a given unit of mass of a substance
In thermodynamics, the specific heat capacity (symbol c) of a substance is the amount of heat that must be added to one unit of mass of the substance
Specific_heat_capacity
Physical property of matter
Lynden-Bell; R. M. Lynden-Bell (Nov 1977). "On the negative specific heat paradox". Monthly Notices of the Royal Astronomical Society. 181 (3): 405–419
Heat_capacity
System that converts heat or thermal energy to mechanical work
A heat engine is a system that transfers thermal energy to do mechanical or electrical work. While originally conceived in the context of mechanical energy
Heat_engine
Absorption refrigerator invented in 1930
has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and
Einstein_refrigerator
Idealized thermodynamic cycle
When work is applied to the system, heat moves from the cold to hot reservoir (heat pump or refrigeration). When heat moves from the hot to the cold reservoir
Carnot_cycle
Model that is used to predict the performance of steam turbine systems
certain heat engines, such as steam turbines or reciprocating steam engines, allow mechanical work to be extracted from a fluid as it moves between a heat source
Rankine_cycle
Performance measure of a device that uses thermal energy
refrigerator, ACs etc. For a heat engine, thermal efficiency is the ratio of the net work output to the heat input; in the case of a heat pump, thermal efficiency
Thermal_efficiency
Observational basis of thermodynamics
various parameters for thermodynamic processes, such as thermodynamic work and heat, and establish relationships between them. They state empirical facts that
Laws_of_thermodynamics
Thermodynamic cycle
Performance, Combustion and Emission Characteristics of a Turbocharged Low Heat Rejection DI Diesel Engine with Extended Expansion Concept". SAE Technical
Miller_cycle
Thermodynamic cycle
given portion of air, the greater expansion ratio converts more energy from heat to useful mechanical energy—meaning the engine is more efficient. The disadvantage
Atkinson_cycle
Perceived risk of mitigated dangers
The preparedness paradox is the proposition that if a society or individual acts effectively to mitigate a potential disaster such as a pandemic, natural
Preparedness_paradox
Heat exchanged by a body or thermodynamic system
Sensible heat is heat exchanged by a body or thermodynamic system in which the exchange of heat changes the temperature of the body or system, and some
Sensible_heat
German physicist and physiologist (1821–1894)
Thomson, Helmholtz and William Rankine helped popularize the idea of the heat death of the universe. In fluid dynamics, Helmholtz made several contributions
Hermann_von_Helmholtz
Concept in general relativity and quantum field theory
for black holes results in a negative heat capacity. In canonical ensembles, there is limitation for a positive heat capacity, whereas microcanonical ensembles
Black_hole_thermodynamics
1798 scientific paper by Benjamin Thompson
"An Inquiry Concerning the Source of the Heat Which Is Excited by Friction" is a scientific paper by Benjamin Thompson, Count Rumford, which was published
An Inquiry Concerning the Source of the Heat Which Is Excited by Friction
An_Inquiry_Concerning_the_Source_of_the_Heat_Which_Is_Excited_by_Friction
Maximum attainable efficiency of any heat engine
efficiency that any heat engine can obtain. Carnot's theorem states that all heat engines operating between the same two thermal or heat reservoirs cannot
Carnot's theorem (thermodynamics)
Carnot's_theorem_(thermodynamics)
Thermodynamic cycle
heat engines that have air or some other gas as their working fluid. It is characterized by isentropic compression and expansion, and isobaric heat addition
Brayton_cycle
Body of matter in a state of internal equilibrium
exchange matter or energy with its surroundings. A closed system may exchange heat, experience forces, and exert forces, but does not exchange matter. An open
Thermodynamic_system
Volume of fluid which passes per unit time
flow respectively, to distinguish from the notation Q {\displaystyle Q} for heat. Volumetric flow rate can also be defined by Q = v ⋅ A , {\displaystyle Q=\mathbf
Volumetric_flow_rate
Process that cannot be undone or reversed
NAD+ and telomerase have also been demonstrated to reverse ageing.) Death Time Heat transfer through a finite temperature difference Friction Plastic deformation
Irreversible_process
Physics of heat, work, and temperature
Thermodynamics is a branch of physics that deals with heat, work, and temperature, and their relation to energy, entropy, and the physical properties of
Thermodynamics
Linked cyclic series of thermodynamic processes
of linked sequences of thermodynamic processes that involve transfer of heat and work into and out of the system, while varying pressure, temperature
Thermodynamic_cycle
Thermodynamic process of a closed system in which volume remains constant
inelastic container: The thermodynamic process is the addition or removal of heat; the isolation of the contents of the container establishes the closed system;
Isochoric_process
Physical law for definition of temperature
by a wall permeable only to heat, and they do not change over time. Another formulation by James Clerk Maxwell is "All heat is of the same kind". Another
Zeroth_law_of_thermodynamics
Function describing equilibrium states of a system
Exchanged heat (in certain discrete amounts) can be associated with changes of state function such as enthalpy. The description of the system heat exchange
State_function
Engine combustion process
of a reciprocating internal combustion engine. In it, fuel is ignited by heat generated during the compression of air in the combustion chamber, into which
Diesel_cycle
Thermodynamic process in which no mass or heat is exchanged with surroundings
is a type of thermodynamic process that occurs without transferring heat between the thermodynamic system and its environment. Unlike an isothermal
Adiabatic_process
Initial step in the phase transition or molecular self-assembly of a substance
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Nucleation
Thermodynamic potential
of the heat bath does not change either, and we can conclude that the heat bath does not perform any work. This implies that the amount of heat that flows
Helmholtz_free_energy
Type of energy transfer
Heat death of the Universe Heat diffusion Heat equation Heat exchanger Heat flux sensor Heat recovery steam generator Heat recovery ventilation Heat transfer
Heat
Chemical process in the liquefaction of gas
introduced regenerative cooling, a positive-feedback cooling system. The heat exchanger arrangement permits an absolute temperature difference (e.g. 0
Hampson–Linde_cycle
Properties independent of system size, and proportional to system size
intensive quantity. If the system is divided by a wall that is permeable to heat or to matter, the temperature of each subsystem is identical. Additionally
Intensive and extensive properties
Intensive_and_extensive_properties
Thermodynamic process in which temperature remains constant
the reservoir through heat exchange (see quasi-equilibrium). In contrast, an adiabatic process is where a system exchanges no heat with its surroundings
Isothermal_process
Version of the second law of thermodynamics
inequality, states that for a thermodynamic system (e.g. heat engine or heat pump) exchanging heat with external thermal reservoirs and undergoing a thermodynamic
Clausius_theorem
Parameter used to calculate the volume change of a fluid or solid in response to pressure
_{S}}}={\frac {1}{\beta _{T}}}+{\frac {\Lambda ^{2}T}{\rho c_{v}}},} where γ is the heat capacity ratio, α is the volumetric coefficient of thermal expansion, ρ =
Compressibility
Variation on the Rankine thermodynamic cycle
The fluid allows heat recovery from lower-temperature sources such as biomass combustion, industrial waste heat, geothermal heat, solar ponds etc. The
Organic_Rankine_cycle
Mathematical models of heat pumps and refrigeration
heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pump, air conditioning and refrigeration systems. A heat
Heat pump and refrigeration cycle
Heat_pump_and_refrigeration_cycle
Thermodynamic process that is reversible and adiabatic
transfers of the system are frictionless, and there is no net transfer of heat or matter. Such an idealized process is useful in engineering as a model
Isentropic_process
Partial differential relations in thermodynamics
physicist James Clerk Maxwell, who first presented them in his text Theory of Heat (1872). Maxwell's relations are useful in problem-solving quantities that
Maxwell_relations
Type of thermodynamic potential
expansion work that can be extracted from a closed system (one that can exchange heat and work with its surroundings, but not matter) at fixed temperature and
Gibbs_free_energy
Thermodynamic process with no change in enthalpy
surroundings. Such a process will be isenthalpic if there is no transfer of heat to or from the surroundings, no work done on or by the surroundings, and
Isenthalpic_process
British physicist, engineer and mathematician (1824–1907)
equilibrium and stop for ever). Thomson also formulated the heat death paradox (Kelvin's paradox) in 1862, which uses the second law of thermodynamics to
Lord_Kelvin
Process whose direction can be reversed
useful in thermodynamics because they are so idealized that the equations for heat and expansion/compression work are simple. This enables the analysis of model
Reversible process (thermodynamics)
Reversible_process_(thermodynamics)
Equation of the state of a hypothetical ideal gas
constant. Under these conditions, p1V1γ = p2V2γ, where γ is defined as the heat capacity ratio, which is constant for a calorifically perfect gas. The value
Ideal_gas_law
Quantifiable conditions of a thermodynamic system at a specific time
example, if it is intended to consider heat transfer for the system, then a wall of the system should be permeable to heat, and that wall should connect the
Thermodynamic_state
Thermodynamic process
idealizable as reversible is slow heat transfer between two bodies on two finitely different temperatures, where the heat transfer rate is controlled by
Quasistatic_process
Property of a thermodynamic system
further from the heat death with time, not closer. This results in an "entropy gap" pushing the system further away from the posited heat death equilibrium
Entropy
Type of thermodynamic cycle
designed and built many unique heat engines based on various thermodynamic cycles. He is credited with inventing two unique heat engine cycles and developing
Ericsson_cycle
Measure of energy in a thermodynamic system
but tables generally list the standard heats of formation of substances at 25 °C (298 K). For endothermic (heat-absorbing) processes, the change ΔH is
Enthalpy
Law of physics
diverges in the limit of T → 0. This violates Eq. (8). Nature solves this paradox as follows: at temperatures below about 100 mK, the vapor pressure 10×10−31 mmHg
Third_law_of_thermodynamics
Thermodynamic process
process equation describes expansion and compression processes which include heat transfer. Some specific values of n correspond to particular cases: n = 0
Polytropic_process
Chemical law
progression is attributed to heat transfer from the surface of the solid of energy necessary to initiate the reaction. The heat transfer rate increases with
Piobert's_law
Thermodynamic cycle that includes the basic Stirling engine
because they involve heat transfer through a finite temperature difference during the irreversible isochoric/isobaric heat-addition and heat-rejection processes
Stirling_cycle
Diagram showing the relationship between pressure and volume in a system
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Pressure–volume_diagram
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Theorem of corresponding states
Theorem_of_corresponding_states
Force distributed over an area
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Pressure
Thermodynamic cycle for spark ignition piston engines
subjected to changes of pressure, temperature, volume, addition of heat, and removal of heat. The gas that is subjected to those changes is called the system
Otto_cycle
Diagram showing the thermodynamic states of a material
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Thermodynamic_diagrams
State of thermodynamic systems where no net flow of matter or energy occurs
Partington, J.R. (1949), pp. 275–278. Coombes, C.A.; Laue, H. (1985). "A paradox concerning the temperature distribution of a gas in a gravitational field"
Thermodynamic_equilibrium
Graph relating temperature and entropy during a thermodynamic process or cycle
visualize the heat transfer during a process. For reversible (ideal) processes, the area under the T–s curve of a process is the heat transferred to
Temperature–entropy_diagram
Relations between flows and forces, or gradients, in thermodynamic systems
pressure differences at constant temperature can cause heat flow. Perhaps surprisingly, the heat flow per unit of pressure difference and the density (matter)
Onsager_reciprocal_relations
Model of fluid flow
remains at the same temperature while flowing in a conduit. In the model, heat transferred through the walls of the conduit is offset by frictional heating
Isothermal_flow
Extensive parameter used to describe a thermodynamic system's state
appropriate value of heat capacity to use in a given process depends on whether the process produces a change in volume. The heat capacity is a function
Volume_(thermodynamics)
Physical quantity
physical system, recognizable in the capacity to do work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy
Energy
Energy contained within a system
transfer of matter, internal energy changes equal the algebraic sum of the heat transferred and the thermodynamic work done. The internal energy cannot be
Internal_energy
Statistical mechanics of quantum-mechanical systems
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Quantum_statistical_mechanics
Scottish mechanical engineer (1820–1872)
expanded Lord Kelvin's theory of universal heat death and, along with Kelvin himself, formulated the heat death paradox, which disproves the possibility of an
W._J._M._Rankine
Kelvin cat's eye pattern Kelvin wake pattern Kelvin angle Kelvin’s heat death paradox Zero Kelvin Kelvin–Stokes theorem Kelvin functions Kelvin problem/Kelvin
List of things named after Lord Kelvin
List_of_things_named_after_Lord_Kelvin
Tendency of matter to change volume in response to a change in temperature
characteristic discontinuities of the coefficient of thermal expansion and specific heat. These discontinuities allow detection of the glass transition temperature
Thermal_expansion
Imaginary volume through which a substance's flow is modeled and analyzed
leaving the control volume. At steady state, and in the absence of work and heat transfer, the energy within the control volume remains constant. It is analogous
Control_volume
Equations in thermodynamics
Density is defined as mass of material per unit volume CV Heat capacity at constant volume Cp Heat capacity at constant pressure βT Isothermal compressibility
Thermodynamic_equations
{\partial ^{2}H}{\partial P^{2}}}} Specific heat (Note - the extensive analog is the heat capacity) Specific heat at constant pressure c P = T N ( ∂ S ∂ T
Material properties (thermodynamics)
Material_properties_(thermodynamics)
Physical law for entropy and heat
universal empirical observation concerning heat and energy interconversions. A simple statement of the law is that heat always flows spontaneously from hotter
Second_law_of_thermodynamics
Specific mathematical differential form
in thermodynamics to express changes in path dependent quantities such as heat and work, but is defined more generally within mathematics as a type of differential
Inexact_differential
Correction factor which describes the deviation of a real gas from ideal gas behavior
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Compressibility_factor
Thermodynamic process
particular heat source and sink available, it finds applications in reuse of industrial process heat, geothermal energy, solar energy, and use of waste heat from
Kalina_cycle
Mass fraction of a saturated mixture which is vapor
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Vapor_quality
Equations on thermodynamic quantities
thermodynamics. The first law of thermodynamics is essentially a definition of heat, i.e. heat is the change in the internal energy of a system that is not caused
Fundamental thermodynamic relation
Fundamental_thermodynamic_relation
Reacting chemical mixture in which the concentrations change periodically
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Chemical_oscillator
Idealized thermodynamic cycle used in engines
involves no heat interaction. Energy is absorbed as heat during the isochoric heating and rejected as work during the isentropic expansion. Waste heat is rejected
Lenoir_cycle
Physical quantity of hot and cold
third law of thermodynamics. It would be impossible to extract energy as heat from a body at that temperature. However, negative absolute temperatures
Temperature
Type of energy transfer
equivalent of heat. Joule estimated a mechanical equivalent of heat to be 819 ft•lbf/Btu (4.41 J/cal). The modern day definitions of heat, work, temperature
Work_(thermodynamics)
Paper by Josiah Willard Gibbs
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
On the Equilibrium of Heterogeneous Substances
On_the_Equilibrium_of_Heterogeneous_Substances
Refrigerator that uses a heat source
refrigerator that uses a heat source to provide the energy needed to drive the cooling process. Solar energy, burning oil, waste heat from factories, and district
Absorption_refrigerator
Thermodynamic potential of entropy, analogous to the free energy
Maxwell's demon Heat death paradox Loschmidt's paradox Synergetics Theories Caloric theory Vis viva ("living force") Mechanical equivalent of heat Motive power
Free_entropy
Gas cooling and liquefaction technique
(as stated by Gay-Lussac's law). The compressed gas is then cooled by a heat exchanger and decompressed, resulting in a (possibly condensed) gas that
Siemens_cycle
Thermodynamic cycle
involves the heated exhaust gas from the turbine being used to make steam in a heat recovery steam generator. The steam so produced is injected into the gas
Cheng_cycle
Equation describing a state of matter under a given set of conditions
{\displaystyle C_{v}} is the specific heat capacity at constant volume, and C p {\displaystyle C_{p}} is the specific heat capacity at constant pressure. Since
Equation_of_state
Device using sound waves to reduce heat
with a piston moving back and forth at room temperature TH a heat exchanger X1 where heat is released to the surroundings at room temperature a regenerator
Pulse_tube_refrigerator
Pair of values which express a thermodynamic system's internal energy
drive changes in entropy, and their product is the energy transferred by heat transfer. The thermodynamic force is always an intensive variable and the
Conjugate variables (thermodynamics)
Conjugate_variables_(thermodynamics)
Assembly of heat engines that work in tandem from the same source of heat
combined-cycle power plant is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy. On land
Combined-cycle_power_plant
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HEAT DEATH-PARADOX
HEAT DEATH-PARADOX
Male
Egyptian
, ("heart"); an early Egyptian astronomer.
Boy/Male
British, English
From the Heath
Boy/Male
American, Anglo, Australian, British, Chinese, Christian, English
Wasteland
Boy/Male
American, Anglo, Australian, British, Christian, English
Cliff Near the Heath; From the Heath Cliff
Female
Egyptian
, house above.
Boy/Male
Christian & English(British/American/Australian)
From Heath or Moorland
Boy/Male
Dutch
Lives at the heath.
Boy/Male
English American
From the heath.
Boy/Male
English
From the heath.
Boy/Male
Hindu, Indian
Heart
Surname or Lastname
English
English : nickname from Middle English derth ‘famine’ (of uncertain application) or de(e)th ‘death’, Old English dēa{dh}. The latter name would have been acquired by someone who had played the part of the personified figure of Death in a pageant or play, or else one who was habitually gloomy or sickly, and the insertion of the letter -r- may have been a deliberate attempt to dissociate the name from death.
Boy/Male
English
From the heath cliff.
Boy/Male
English American
Untended land where flowering shrubs grow. Used both as a first name and surname.
Male
English
English surname transferred to forename use, HEATH means "heath."
Boy/Male
Christian & English(British/American/Australian)
Heath Covered Moorland
Biblical
heath; tamarisk
Boy/Male
English
From the heath.
Surname or Lastname
English
English : topographic name for someone who lived on a heath (Middle English hethe, Old English hǣð) or a habitational name from any of the numerous places, for example in Bedfordshire, Derbyshire, Herefordshire, Shropshire, and West Yorkshire, named with this word. The same word also denoted heather, the characteristic plant of heathland areas. This surname has also been established in Dublin since the late 16th century.
Boy/Male
English
From the heath.
Girl/Female
Biblical
Heath, tamarisk.
HEAT DEATH-PARADOX
HEAT DEATH-PARADOX
HEAT DEATH-PARADOX
HEAT DEATH-PARADOX
HEAT DEATH-PARADOX
HEAT DEATH-PARADOX
HEAT DEATH-PARADOX
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