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Relation between temperature and the equilibrium constant of a chemical reaction
The Van 't Hoff equation relates the change in the equilibrium constant, Keq, of a chemical reaction to the change in temperature, T, given the standard
Van_'t_Hoff_equation
Dutch physical and organic chemist (1852–1911)
Jacobus Henricus van 't Hoff Jr. (Dutch: [vɑn (ə)t ˈɦɔf]; 30 August 1852 – 1 March 1911) was a Dutch physical chemist. A highly influential theoretical
Jacobus_Henricus_van_'t_Hoff
Formula for temperature dependence of rates of chemical reactions
proposed the equation on the basis of the work of Dutch chemist Jacobus Henricus van 't Hoff, who had noted in 1884 that the Van 't Hoff equation for the temperature
Arrhenius_equation
Measure of solute effect
The van 't Hoff factor i (named after Dutch chemist Jacobus Henricus van 't Hoff) is a measure of the effect of a solute on colligative properties such
Van_'t_Hoff_factor
Surname list
Van 't Hof and Van 't Hoff are Dutch toponymic surnames meaning "from the homestead". Other variants are Van Hoff, Van den Hof, Van der Hoff, Van't Hof
Van_'t_Hof
Relation between vapour pressure and temperature
{\displaystyle \kappa _{T}=-(1/v)(\mathrm {d} v/\mathrm {d} P)_{T}} is the isothermal compressibility. Van 't Hoff equation Antoine equation Lee–Kesler method
Clausius–Clapeyron_relation
physical chemistry in the late 19th century and early 20th century. The Van 't Hoff equation in chemical thermodynamics relates the change in the equilibrium
List_of_Dutch_discoveries
Topics referred to by the same term
Van't Hoff (crater), crater on the Moon Van 't Hoff equation Van 't Hoff factor, formula used in physical chemistry Le Bel-van't Hoff rule Drummer Hoff, a
Hoff
Capacity of a substance to dissolve in a homogeneous way
a given compound may increase or decrease with temperature. The van 't Hoff equation relates the change of solubility equilibrium constant (Ksp) to temperature
Solubility
Measure of the tendency of a solution to take in pure solvent by osmosis
approximate this equation as Π = i c R T {\displaystyle \Pi =icRT} where Π {\displaystyle \Pi } is osmotic pressure, i is the dimensionless van 't Hoff index, c
Osmotic_pressure
Thermodynamic equation
relates the Gibbs energy to a chemical equilibrium constant, the van 't Hoff equation can be derived. Since the change in a system's Gibbs energy is equal
Gibbs–Helmholtz_equation
Industrial process for ammonia production
quickly becomes unfavorable at atmospheric pressure, according to the Van 't Hoff equation. Lowering the temperature is unhelpful because the catalyst requires
Haber_process
Gas law regarding proportionality of dissolved gas
generally be described with the Van 't Hoff equation, which also applies to Henry's law constants: d ln H d ( 1 / T ) = − Δ sol H R , {\displaystyle
Henry's_law
When the ratio of reactants to products of a chemical reaction is constant with time
involved, though it does depend on temperature as observed by the van 't Hoff equation. Adding a catalyst will affect both the forward reaction and the
Chemical_equilibrium
Dutch physicist (1837–1923)
Nobel Prize in Physics in 1910 "for his work on the equation of state for gases and liquids." Van der Waals started his career as a schoolteacher, before
Johannes Diderik van der Waals
Johannes_Diderik_van_der_Waals
Measure of an acid's strength in solution
according to the van 't Hoff equation d ln ( K ) d T = Δ H ⊖ R T 2 {\displaystyle {\frac {\mathrm {d} \ln \left(K\right)}{\mathrm {d} T}}={\frac {\Delta
Acid_dissociation_constant
Buffer solution commonly used in biological research
760 cal/mol (3180 J/mol) and a linear dependence of pKa0 on 1/T (Van 't Hoff equation). The positive ∆H0 results in an increase in Ka, and thus a decrease
Phosphate-buffered_saline
Symbolic representation of a chemical reaction
notation ⇄ was proposed in 1884 by the Dutch chemist Jacobus Henricus van 't Hoff. Van 't Hoff called reactions that didn't proceed to completion "limited reactions"
Chemical_equation
American chemist
possible the verification and correction of van 't Hoff's theory. In a modern formulation, van 't Hoff's equation states that ΠV = nRT, where Π is the osmotic
Harmon_Northrop_Morse
Method used in chemical kinetics
constant and dT is the change in temperature then the enthalpy change is given by the Van 't Hoff equation: Δ H o = R T 2 . d ln K d T {\displaystyle
Temperature_jump
Chemical property
K at a temperature, T2, knowing the value at temperature T1. The van 't Hoff equation also shows that, for an exothermic reaction ( Δ H < 0 {\displaystyle
Equilibrium_constant
Class of organic compounds
squares fit to the solubility measurements. This equation is derived from the integrated Van 't Hoff equation and the logarithmic Setchenow salinity dependence
Chlorofluorocarbon
Intentional and temporary cessation of cardiac activity, primarily for cardiac surgery
further lower myocardial metabolism during periods of ischemia. The Van 't Hoff equation allows calculation that oxygen consumption will drop by 50% for every
Cardioplegia
Naturally produced monosaccharide
sugars and correctly predicted the possible isomers, applying the Van 't Hoff equation of asymmetrical carbon atoms. The names initially referred to the
Glucose
Principle to predict effects of a change in conditions on a chemical equilibrium
enunciated the principle in 1884 by extending the reasoning from the Van 't Hoff relation of how temperature variations changes the equilibrium to the
Le_Chatelier's_principle
This is a list of scientific equations named after people (eponymous equations). Contents A B C D E F G H I J K L M N O P R S T V W Y Z See also References
List of scientific equations named after people
List_of_scientific_equations_named_after_people
Law about the rate of chemical reactions
kinetic data and the rate equation they proposed. It was later clarified independently by the Dutch chemist Jacobus Henricus van 't Hoff in 1877. Guldberg and
Law_of_mass_action
Phenomenon of surface adhesion
they obey the Van 't Hoff equation: ( ∂ ln K ∂ 1 T ) θ = − Δ H R . {\displaystyle \left({\frac {\partial \ln K}{\partial {\frac {1}{T}}}}\right)_{\theta
Adsorption
Potential energy of water per unit volume relative to water in known conditions
concentration (in molarity) to solute potential is given by the van 't Hoff equation: Ψ π = − M i R T {\displaystyle \Psi _{\pi }=-MiRT} where M {\displaystyle
Water_potential
Study of the rates of chemical reactions
reaction is proportional to the quantity of the reacting substances. Van 't Hoff studied chemical dynamics and in 1884 published his famous "Études de
Chemical_kinetics
Theory describing chemical reaction rates
approaches were taken as summarized below. In 1884, Jacobus van 't Hoff proposed the Van 't Hoff equation describing the temperature dependence of the equilibrium
Transition_state_theory
Enthalpy difference due to chemical reaction, reduced to standard states
found from the van 't Hoff equation as Δ rxn H ⊖ = R T 2 d d T ln K e q {\displaystyle \Delta _{\text{rxn}}H^{\ominus }={RT^{2}}{\frac {d}{dT}}\ln K_{\mathrm
Standard_enthalpy_of_reaction
Methodology for the study of ancient temperatures
concentration of isotopes. The excess is greatest at low temperature (see Van 't Hoff equation), with the isotopic distribution becoming more randomized at higher
Paleothermometer
Constants that describe stability of coordination complexes
temperature according to the Van 't Hoff equation d ( ln K ) d T = Δ H m ⊖ R T 2 {\displaystyle {\frac {d(\ln K)}{dT}}={\frac {\Delta {\mathit {H}}_{\mathrm
Stability constants of complexes
Stability_constants_of_complexes
Subdiscipline of chemistry concerned with chemical equilibrium
approximation, the van 't Hoff equation may be used. d ln K d T = Δ H ⊖ R T 2 or d ln K d 1 T = − Δ H ⊖ R {\displaystyle {\frac {d\ln K}{dT}}\ ={\frac
Equilibrium_chemistry
Chemistry). The Van 't Hoff equation has been widely utilized to explore the changes in state functions in a thermodynamic system. The Van 't Hoff plot, which
Glossary_of_engineering:_M–Z
List of definitions of terms and concepts related to civil engineering
it is typically 60 Hz. vacuum valve van der Waals equation van der Waals force van 't Hoff equation van 't Hoff factor Venturi effect vibration viscoelasticity
Glossary_of_civil_engineering
Material property relating molality to freezing point depression
point T f {\displaystyle T_{\mathrm {f} }} of the solution; i is the van ‘t Hoff factor, representing the number of particles the solute dissociates into
Cryoscopic_constant
Dutch chemist (1860-1938)
Johannes van Laar (10 July 1860 – 9 December 1938) was a Dutch chemist who is best known for the equations regarding chemical activity. Van Laar equation is
Johannes_van_Laar
Physical phenomenon
lower the effective number of particles in the solution. Equation after including the van 't Hoff factor: ΔTb = Kb · bsolute · i The above formula reduces
Boiling-point_elevation
Methods of storing hydrogen for later use
van 't Hoff equation, relates temperature and partial pressure of hydrogen during the desorption process. The modifications to the standard equation are
Hydrogen_storage
Relation between the ionization state of a gas and the temperature and pressure
Henricus van 't Hoff, used in physical chemistry for its application to molecular dissociation. Also, a significant improvement in the Saha equation introduced
Saha_ionization_equation
the work of Dutch chemist Jacobus Henricus van 't Hoff who had noted in 1884 that Van 't Hoff's equation for the temperature dependence of equilibrium
Glossary_of_engineering:_A–L
Measure of temperature sensitivity in muscles
parameter that is thought to come from the late 19th century, in the work of van ’t Hoff. Q10 is a measure of temperature sensitivity based on chemical reaction
Q10_(temperature_coefficient)
German chemist and philosopher (1853–1932)
the founders of the field of physical chemistry, with Jacobus Henricus van 't Hoff, Walther Nernst and Svante Arrhenius. He received the Nobel Prize in
Wilhelm_Ostwald
Study of how temperature affects the nucleic acid structure
According to the Van´t Hoff equation, the relation between free energy, ΔG, and K is ΔG° = -RTln K, where R is the ideal gas law constant, and T is the kelvin
Nucleic_acid_thermodynamics
Properties of solutions that depend only on the number of solute particles
in solution, then the number of moles of solute is increased by the van 't Hoff factor i {\displaystyle i} , which represents the true number of solute
Colligative_properties
Dutch physicist (1888–1966)
Ornstein were jointly responsible for the derivation of the Ornstein–Zernike equation in critical-point theory. In 1915, he became lector in theoretical mechanics
Frits_Zernike
Device for measuring a polymer's average molecular weight
ideally dilute solution, van ‘t Hoff's law of osmotic pressure can be used to calculate Mn from osmotic pressure. lim c → 0 ( Π c ) = R T M n {\displaystyle
Membrane_osmometer
Calculation involving electrolyte solutions
reviewed osmotic coefficient or activity coefficient data. Davies equation Van 't Hoff factor Bromley, L.A. (1973). "Thermodynamic properties of strong
Bromley_equation
Quantity characterizing the deviation of a solvent from ideal behavior
calculated theoretically by Pitzer equations or TCPC model. Bromley equation Pitzer equation Davies equation van 't Hoff factor Law of dilution Thermodynamic
Osmotic_coefficient
Law of thermodynamics for vapour pressure of a mixture
(such as an electrolyte/salt), the expression of the law includes the van 't Hoff factor as a correction factor. That is, the mole fraction must be calculated
Raoult's_law
Dutch physicist (1895–1981)
Ehrenfest, where he obtained his PhD in 1918. He is known for the Burgers' equation, the Burgers vector in dislocation theory and the Burgers material in viscoelasticity
Jan_Burgers
Dutch physicist (1853–1928)
transformations to describe orbiting electrons in 1897. Larmor's and Lorentz's equations look somewhat dissimilar, but they are algebraically equivalent to those
Hendrik_Lorentz
technology involved some significant events, listed below. Jacobus Henricus van 't Hoff and Joseph Achille Le Bel, working independently, develop a model of
1873_in_science
Drop in freezing temperature of a solvent due to the addition of solute
freezing point. The degree of dissociation is measured by determining the van 't Hoff factor i by first determining mB and then comparing it to msolute. In
Freezing-point_depression
Separation of molecules or ionic compounds into smaller constituent entities
dissociation. There is a simple relationship between this parameter and the van 't Hoff factor i {\displaystyle i} . If the solute substance dissociates into
Dissociation_(chemistry)
Change in energies of a thermodynamic system with respect to particle number
formal concentration, and these differ by the van 't Hoff factor. Moreover, the dilute limit form R T ln ( x ) {\displaystyle RT\ln(x)} applies only
Chemical_potential
– Jirí Vackář Van Allen radiation belt – James Van Allen Van de Graaff generator – Dr. Robert Jemison Van de Graaff Van der Pol equation, oscillator –
Scientific phenomena named after people
Scientific_phenomena_named_after_people
Concept in thermodynamics
reactions. isoequilibrium relation (IER), isoequilibrium effect : On a Van 't Hoff plot, there exists a common intersection point describing the thermodynamics
Enthalpy–entropy_compensation
German scientist (1812–1864)
situation. Similar laboratory results were published by Jacobus Henricus van 't Hoff and Svante Arrhenius 30 years later, with a much greater impact. Wilhelmy
Ludwig_Wilhelmy
Dutch theoretical physicist (1931–2021)
[mɑrˈtinʏs], [jʏsˈtinʏs] and [ɣoːdəˈfridʏs]. van Delft, Dirk (2023). Verrek, dat is 't! Het strijdvaardige leven van Nobelprijswinnaar Martinus Veltman (in
Martinus_J._G._Veltman
Random motion of particles suspended in a fluid
velocity to which it gives rise. The former was equated to the law of van 't Hoff while the latter was given by Stokes's law. He writes k ′ = p o / k {\displaystyle
Brownian_motion
Dutch computer scientist Herman Hertzberger, Dutch architect Jacobus van 't Hoff, Dutch chemist and Nobel laureate Geert Hofstede, Dutch organizational
List of the Delft University of Technology Alumni
List_of_the_Delft_University_of_Technology_Alumni
Branch of chemistry
chemicals, the activated complex and their corresponding differential equations. Cheminformatics (also known as chemoinformatics) The use of computer
Theoretical_chemistry
Swedish scientist (1859–1927)
chemistry, such as Rudolf Clausius, Wilhelm Ostwald, and Jacobus Henricus van 't Hoff. They were far more impressed, and Ostwald even came to Uppsala to persuade
Svante_Arrhenius
of Chemistry of the Carbon Compounds; or, Organic Chemistry Jacobus van 't Hoff and Achille Le Bel independently propose that organic molecular models
1874_in_science
Molarity of osmotically active particles
is water intoxication. Molarity Molality Plasma osmolality Tonicity van 't Hoff factor D. J. Taylor, N. P. O. Green, G. W. Stout Biological Science McNaught
Osmotic_concentration
Dutch musician
incredible guitar player and a very steddy [sic] bass player (Armand van der Hoff). And I actually learned how to play there, how to play very tight, how
Arjen_Lucassen
Theory and paradigm of statistics
Bayesian Statistics in Python (2nd ed.). O'Reilly. ISBN 978-1-4920-8946-9. Hoff, Peter D. (2009). A First Course in Bayesian Statistical Methods (2nd ed
Bayesian_statistics
Science Museum in Leiden, Netherlands
Chemistry: Dutch First Nobel Prize Dutch scientist Jacobus Henricus van 't Hoff (1852–1911) was the first person to receive the Nobel Prize in Chemistry
Museum_Boerhaave
Jean-Robert Argand by nine years. Arrhenius equation. The equation was first proposed by the Dutch chemist J. H. van 't Hoff in 1884; five years later in 1889,
List of examples of Stigler's law
List_of_examples_of_Stigler's_law
Dutch-American physical chemist (1884–1966)
electrolyte solutions. Although an improvement was made to the Debye–Hückel equation in 1926 by Lars Onsager, the theory is still regarded as a major forward
Peter_Debye
Biochemistry process
van 't Hoff enthalpy described as follows: Δ H v H ( T ) = − R d ln K d T − 1 {\displaystyle \Delta H_{vH}(T)=-R{\frac {d\ln K}{dT^{-1}}}} at T = T
Equilibrium_unfolding
Henricus van 't Hoff published Études de Dynamique chimique (Studies in Dynamic Chemistry), a seminal study on chemical kinetics. In this work, van 't Hoff entered
History_of_chemistry
Isotope table (complete) Isotope table (divided) Israel Shahak IUPAC J. H. van 't Hoff Jade James Batcheller Sumner James Dewar Jaroslav Heyrovský Jasper Jean-Marie
Index_of_chemistry_articles
Dutch university
Technology in 1986. Dutch Nobel laureates Jacobus Henricus van 't Hoff, Heike Kamerlingh Onnes, and Simon van der Meer have been associated with TU Delft. TU Delft
Delft University of Technology
Delft_University_of_Technology
Electrode that is pH-sensitive
publication — The Journal of Physical Chemistry by W. Ostwald and J. H. van 't Hoff) — 1909). F. Haber und Z. Klemensiewicz. Über elektrische Phasengrenzkräft
Glass_electrode
Area of applied mathematics
publications. These eras may be associated with leaders: the first is the van 't Hoff era, the second may be called the Semenov–Hinshelwood era and the third
Chemical reaction network theory
Chemical_reaction_network_theory
Measure of energy in a thermodynamic system
Physical Chemistry: An advanced treatise. New York, NY: Academic. p. 29. de Hoff, R. (2006). Thermodynamics in Materials Science. Boca Raton, FL: CRC Press
Enthalpy
History of chemical crystallography to 1895
Brescia & Mangiaracina 1976. Mainzer 1996, p. 481, footnote 144. van 't Hoff 1874; van 't Hoff 1898; Richardson 1901, pp. 35–46; Le Bel 1874; Le Bel 1963;
Chemical crystallography before X-rays
Chemical_crystallography_before_X-rays
Ukrainian mathematician specializing in group analysis of differential equations Ursula van Rienen (born 1957), German applied mathematician, expert in simulating
List_of_women_in_mathematics
set of atoms but in different arrangements. In 1874, Jacobus Henricus van 't Hoff proposed that the carbon atom bonds to other atoms in a tetrahedral arrangement
History_of_atomic_theory
combining capacity of an element. van der Waals force One of the forces (attraction/repulsion) between molecules. van 't Hoff factor The ratio of moles of
Glossary_of_chemistry_terms
Héroult, Paul Hertz, Heinrich Hewitt, Peter Cooper Hewlett, William Reddington Hoff, Marcian Hopkinson, Edward Hopkinson, John Hopper, Grace Horowitz, Paul Houston
Index of electrical engineering articles
Index_of_electrical_engineering_articles
Self-amplifying chain of events
energy as previously proposed for initiation of chemical reactions by van' t Hoff. Christiansen and Kramers also noted that if, in one link of the reaction
Chain_reaction
Avoiding doing a task that needs to be completed
procrastination (expectancy, value, and impulsiveness) into a mathematical equation. The pleasure principle may be responsible for procrastination; one may
Procrastination
Pierre Curie and Jacques Curie: Piezoelectricity. 1884: Jacobus Henricus van 't Hoff: discovered the laws of chemical dynamics and osmotic pressure in solutions
Timeline of scientific discoveries
Timeline_of_scientific_discoveries
British motoring television series
2017). "The Grand Tour season 2 confirms celebrity guests including The Hoff, Jack Bauer and Luke Evans". Digital Spy. Archived from the original on 16
The_Grand_Tour
American physical chemist, inventor and philanthropist
University of Berlin with Jacobus Henricus van 't Hoff, receiving an advanced degree in 1901. The following year, van’t Hoff was awarded the first-ever Nobel Prize
Frederick_Gardner_Cottrell
predict the properties of as-yet unknown elements. Jacobus Henricus van 't Hoff and Joseph Achille Le Bel, working independently, develop a model of
Timeline_of_chemistry
American physical chemist (1875–1946)
familiar thermodynamics of heat (enthalpy) of Berthelot, Ostwald, and Van ’t Hoff, and the calorimetric school. Heat of reaction is not, of course, a measure
Gilbert_N._Lewis
Body variation
Verrill, 1876; Phillips, 1933; Croker, 1934; Phillips, 1961; Smith, 1963 Hoff, 2003:90 Nigmatullin et al., 2001; Roper et al., 2010b:301 Wormuth, 1976:38;
Cephalopod_size
Hungarian-American mathematician, aerospace engineer and physicist (1881–1963)
Chaplygin–Kármán–Tsien approximation (potential flow) Falkowich–Kármán equation (transonic flow) von Kármán constant (wall turbulence) Kármán–Moore theory
Theodore_von_Kármán
scraps of paper with calculation, to satisfy their curiosity about an equation. Even into the period of programmable calculators, Richard Feynman would
History_of_computing
American engineer (1898–1966)
correlation for turbulent flows," which became known as the Dittus-Boelter equation. In 1957 he was awarded the ASME Medal. Boelter was born Winona, Minnesota
Llewellyn_M._K._Boelter
(born 1857), German-born pediatric bacteriologist. March 1 – Jacobus van 't Hoff (born 1852), Dutch chemist. May 21 – Williamina Fleming (born 1857),
1911_in_science
American chemist
Academies Press, Keyes was also notable for "advances in thermodynamics, equations of state of gases, and thermodynamic properties, in particular liquid
Frederick_G._Keyes
PMID 11668534. Spek, Trienke M. van der (2006). "Selling a Theory: The Role of Molecular Models in J. H. van 't Hoff's Stereochemistry Theory". Annals
List of people considered father or mother of a scientific field
List_of_people_considered_father_or_mother_of_a_scientific_field
equilibria and reaction velocities. He, along with Jacobus Henricus van 't Hoff and Svante Arrhenius, are usually credited with being the modern founders
List of atheists in science and technology
List_of_atheists_in_science_and_technology
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