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Topic: Johannes van der Waals


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  CONK! Encyclopedia: Johannes_Diderik_van_der_Waals   (Site not responding. Last check: 2007-10-20)
Johannes Diderik van der Waals (November 23, 1837 – March 8, 1923) was a Dutch scientist famous "for his work on the equation of state for gases and liquids", for which he won the Nobel Prize in physics in 1910.
Van der Waals was the first to realize the necessity of taking into account the volumes of molecules and the intermolecular forces (now generally called "van der Waals forces") in establishing the relationship between the pressure, volume and temperature of gases and liquids.
Van der Waals was born in Leiden, the Netherlands, as the son of Jacobus van der Waals and Elisabeth van den Burg.
www.conk.com /search/encyclopedia.cgi?q=Johannes_Diderik_van_der_Waals   (221 words)

  
 Van der Waals force - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-20)
In chemistry, the term Van der Waals force originally referred to all forms of intermolecular forces; however, in modern usage it tends to refer to intermolecular forces that deal with forces due to the polarization of molecules.
Van der Waals interactions are observed in noble gases, which are very stable and tend not to interact.
The London-Van der Waals force is related to the Casimir effect for dielectric media, the former the microscopic description of the latter bulk property.
en.wikipedia.org /wiki/Van_der_Waals_force   (754 words)

  
 Van der Waals radius
The van der Waals radius of an atom is the radius of an imaginary hard sphere which can be used to model the atom for many purposes.
Van der Waals radii are determined from measurements of atomic spacing between pairs of unbonded atoms in crystals.
The van der Waals radius is named after Johannes Diderik van der Waals, winner of the 1910 Nobel Prize in Physics.
ebroadcast.com.au /lookup/encyclopedia/va/Van_der_Waals_radius.html   (345 words)

  
 Kyle Detweiler
Johannes Diderik van der Waals was born in Leyden in 1873 and died in 1923.
In 1980 van der waals had done it again he related his equation of state with the second law of thermodynamics in the form proposed by a W. Gibbs.
Van der Waals thought that there was a very rapid change in density at the point between liquid and vapor.
www.hesston.edu /academic/FACULTY/NELSONK/PhysicsResearch/Waals   (910 words)

  
 EZGeography - Johannes Diderik van der Waals
Johannes Diderik van der Waals (November 23, 1837 – March 8, 1923) was a Dutch scientist famous "for his work on the equation of state for gases and liquids", for which he won the Nobel Prize in physics in 1910.
Van der Waals was the first to realise the necessity of taking into account the volumes of molecules and the intermolecular forces (now generally called "van der Waals forces") in establishing the relationship between the pressure, volume and temperature of gases and liquids.
He became a school teacher, and later was allowed to study at the university, in spite of his lack of classical languages.
www.ezgeography.com /encyclopedia/Johannes_van_der_Waals   (227 words)

  
 Van der Waals radius -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-20)
The van der Waals radius of an ((physics and chemistry) the smallest component of an element having the chemical properties of the element) atom is the radius of an imaginary hard (A particular environment or walk of life) sphere which can be used to model the atom for many purposes.
Van der Waals radii are determined from measurements of atomic spacing between pairs of unbonded atoms in (A crystalline element used as a component in various electronic devices) crystals.
The van der Waals radius is named after (Dutch physicist (1837-1923)) Johannes Diderik van der Waals, winner of the 1910 (Surf for more about Nobel Prize in Physics) Nobel Prize in Physics.
www.startsurfing.com /encyclopedia/v/va/van_der_waals_radius.htm   (417 words)

  
 CONK! Encyclopedia: Van_der_Waals_equation   (Site not responding. Last check: 2007-10-20)
The van der Waals equation is an equation of state for a fluid composed of particles that have a non-zero size and a pairwise attractive inter-particle force (such as the van der Waals force.) It was derived by Johannes Diderik van der Waals in 1873, based on a modification of the ideal gas law.
The derivation of the van der Waals equation begins with the equation of state of an ideal gas, which is composed of non-interacting point particles:
Although the material constants a and b in the usual form of the van der Waals equation differs for every single gas/fluid considered, the equation can be recast into an invariant form applicable to all gases/fluids.
www.conk.com /search/encyclopedia.cgi?q=Van_der_Waals_equation   (613 words)

  
 Johannes Diderik van der Waals - Wikipedia
Ohne das Abitur als Zugangsberechtigung zu einem Hochschulstudium zu besitzen, besuchte van der Waals in der Zeit von 1862 bis 1865 an der Universität Leiden Vorlesungen und Seminare.
1866 übernahm van der Waals eine Stelle an einer weiterführenden Schule in Den Haag, an der er später auch Schuldirektor wurde.
Van der Waals schloss 1873 sein Studium mit einer Dissertation in Physik ab.
de.wikipedia.org /wiki/Johannes_Diderik_van_der_Waals   (278 words)

  
 Famous scientists of thermodynamics   (Site not responding. Last check: 2007-10-20)
The immediate cause of Van der Waals' interest in the subject of his thesis was R. Clausius' treatise considering heat as a phenomenon of motion, which led him to look for an explanation for T. Andrews' experiments (1869) revealing the existence of "critical temperatures " in gases.
It was Van der Waals' genius that made him see the necessity of taking into account the volumes of molecules and the intermolecular forces ("Van der Waals forces", as they are now generally called) in establishing the relationship between the pressure, volume and temperature of gases and liquids.
Van der Waals was the recipient of numerous honours and distinctions, of which the following should be particularly mentioned.
about-thermodynamics.com /waals.html   (902 words)

  
 AllRefer.com - Johannes Diderik van der Waals (Physics, Biography) - Encyclopedia
Johannes Diderik van der Waals[yOhA´nus dE´durik vAn dur vAls] Pronunciation Key, 1837–1923, Dutch physicist.
It had been known for some time that the behavior of real gases differs from that of an ideal gas as predicted by thermodynamics and the kinetic-molecular theory of gases.
Van der Waals was led to the hypothesis of the continuity of the gaseous and liquid states of matter by combining the kinetic theory of gases with Laplace's theory of capillarity.
reference.allrefer.com /encyclopedia/V/vandrWls.html   (222 words)

  
 Johannes Diderik van der Waals - Wikipedija, prosta enciklopedija   (Site not responding. Last check: 2007-10-20)
Johannes Diderik van der Waals, nizozemski fizik in kemik, *23.
Van der Waals je znan »po svojem delu o enačbi stanja za pline in kapljevine«, za kar je leta 1910 prejel Nobelovo nagrado za fiziko.
Van der Waals se je rodil očetu Jacobusu van der Waalsu in Elisabethi van den Burgovi.
sl.wikipedia.org /wiki/Johannes_Diderik_van_der_Waals   (104 words)

  
 KNAW > Van der Waals > Scientists > Van der Waals
Johannes Diderik Van der Waals (1837-1923) was born in Leiden, the oldest of the ten children of a carpenter.
In the thesis, he introduced the concepts of molecular volume and molecular attraction (presently known as the Van der Waals force), and described the behavior of condensing gases and criticality by means of the famous Van der Waals equation.
Van der Waals was elected to the Royal Netherlands Academy of Arts and Sciences (KNAW) in 1875, and to the Holland Society of Sciences and Humanities (HMW) in 1878.
www.knaw.nl /waals/waals.html   (1050 words)

  
 MSN Encarta - Search Results - Waals Johannes Diderik van der   (Site not responding. Last check: 2007-10-20)
Waals, Johannes Diderik van der (1837-1923), Dutch physicist and Nobel laureate.
Van der Waals Forces, weakest of the forces that occur between atoms or molecules, and named after the Dutch physicist, Johannes Diderik van der Waals....
The forces of attraction account for the cohesion of molecules in the liquid and solid states of matter, and are called long-range forces or van der...
uk.encarta.msn.com /Waals_Johannes_Diderik_van_der.html   (168 words)

  
 Van der Waals force -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-20)
Van der Waals interactions are observed in (Click link for more info and facts about noble gases) noble gases, which are very stable and tend not to interact.
The Van der Waals force is the force to which the (Any of various small chiefly tropical and usually nocturnal insectivorous terrestrial lizards typically with immovable eyelids; completely harmless) gecko's unique ability to cling to smooth surfaces is attributed.
The London-Van der Waals force is related to the (Click link for more info and facts about Casimir effect) Casimir effect for dielectric media, the former the microscopic description of the latter bulk property.
www.absoluteastronomy.com /encyclopedia/v/va/van_der_Waals_force.htm   (737 words)

  
 Deviations from Ideal Gas Law Behavior:
Van der Waals proposed that we correct for the fact that the volume of a real gas is too large at high pressures by subtracting a term from the volume of the real gas before we substitute it into the ideal gas equation.
The van der Waals equation gives results that are larger than the ideal gas equation at very high pressures, as shown in the figure above, because of the volume occupied by the CO molecules.
According to the table of van der Waals constants, the volume of a mole of argon atoms is 0.03219 liters.
chemed.chem.purdue.edu /genchem/topicreview/bp/ch4/deviation5.html   (1258 words)

  
 Johannes van der waals, Science, Free Essays @ ChuckIII College Resources
Biography Johannes Diderik van der Waals was born on November 23, 1837 in Leyden, located in The Netherlands.His parents were Jacobus van der Waals, a carpenter and Elisabeth van den Burg.
Van der Waals forces scientific definition is, a term used to describe the weakest intermolecular attractions; these include dispersion forces and dipole interactions.
Johannes van der Waals equation of state looks like this: He arrived at this conclusion by probably one day looking at the ideal gas equation, and figuring something was not correct about it.
www.chuckiii.com /Reports/Science/Johannes_van_der_waals.shtml   (1964 words)

  
 Johannes van der Waals --  Britannica Student Encyclopedia
The weak attractive forces between atoms or molecules, van der Waals forces, were named in honor of Johannes van der Waals, a Dutch physicist.
Van der Waals received the Nobel prize in physics in 1910 for his research on the gaseous and liquid states of matter in which he developed a formula for the continuity of all gases, the van der Waals equation.
The Renaissance astronomer and astrologer Johannes Kepler is best known for his discovery that the orbits in which the Earth and the other planets of the solar system travel around the sun are elliptical, or oval, in shape.
www.britannica.com /ebi/article-9277632   (876 words)

  
 [No title]   (Site not responding. Last check: 2007-10-20)
Johannes Diederik Van Der Waals was born november 23, 1837, in Leiden, Netherlands, and died march 9, 1923 in Amsterdam.
Van Der Vaals knew that the perfect gas law was not true to actual states of molecules in the gas phase so started working on his own equation of state.
Van Der Waals equation was deriver from the aknowledgment that both these two assumptions are wrong.
www.chem.shef.ac.uk /chm131-2003/cha03lg/vanderwaals.html   (398 words)

  
 J. D. van der Waals - Biography
Johannes Diderik van der Waals was born on November 23, 1837 in Leyden, The Netherlands, the son of Jacobus van der Waals and Elisabeth van den Burg.
Van't Hoff and Hugo de Vries, the geneticist, he contributed to the fame of the University, and remained faithful to it until his retirement, in spite of enticing invitations from elsewhere.
The son, Johannes Diderik Jr., was Professor of Physics at Groningen University 1903-08, and subsequently succeeded his father in the Physics Chair of the University of Amsterdam.
nobelprize.org /physics/laureates/1910/waals-bio.html   (908 words)

  
 van der Waals Equation of State
A modification of the ideal gas law was proposed by Johannes D. van der Waals in 1873 to take into account molecular size and molecular interaction forces.
It is usually referred to as the van der Waals equation of state.
The van der Waals equation of state approaches the ideal gas law PV=nRT as the values of these constants approach zero.
hyperphysics.phy-astr.gsu.edu /hbase/kinetic/waal.html   (408 words)

  
 Van der Waals force
In chemistry, the term van der Waals force originally referred to all forms of intermolecular forces; however, in modern usage it tends to refer only to London forces: those forces which arise from induced rather than permanent dipoles.
The forces are named after Johannes Diderik van der Waals.
The Van Der Waals force is the force attributed to the Gecko's unique ability to cling to smooth surfaces.
www.ebroadcast.com.au /lookup/encyclopedia/va/Van_der_Waals_force.html   (132 words)

  
 Van Der Waals Johannes Diderik: Free Encyclopedia Articles at Questia.com Online Library   (Site not responding. Last check: 2007-10-20)
VAN DER WAALS, JOHANNES DIDERIK yoha n s de d rik van d r vals...kinetic-molecular theory of gases.
Van der Waals was led to the hypothesis of the...of mutual attraction (now called van der Waals forces).
WAALS, JOHANNES DIDERIK VAN DER see van der Waals, Johannes Diderik.
www.questia.com /library/encyclopedia/van-der-waals-johannes-diderik.jsp?l=V&p=1   (491 words)

  
 About Johannes van der Waals and Pieter Zeeman - Van der Waals-Zeeman Instituut - Universiteit van Amsterdam (UvA)   (Site not responding. Last check: 2007-10-20)
Van der Waals received the Nobel Prize in Physics in 1910.
In 1908 Van der Waals (Nobel Prize in Physics for 1910) reached the retiring age of 70 and Zeeman was chosen as his successor, at the same time functioning as Director of the Physics Laboratory.
In 1923 a new laboratory, specially erected for him, was put at his disposal, a prominent feature being a concrete block weighing a quarter of a million kilograms, erected free from the floor, as a suitable platform for vibration-free experiments.
www.science.uva.nl /wzi/object.cfm/objectID=F962C400-EFCD-4677-8227D502967C2081   (2173 words)

  
 KNAW > Van der Waals > How Fluids Unmix
This achievement was the consequence of the felicitous collaboration of two Dutch physicists and Nobel prize winners, Johannes Diderik van der Waals (1837-1923) at the University of Amsterdam, and Heike Kamerlingh Onnes (1853-1926) at the University of Leiden.
In 1890, Van der Waals, by generalizing his famous equation of state to fluid mixtures, brought Gibbs’s abstract thermodynamics to practical application.
Van der Waals’ mixture equation inspired a major experimental effort by Kamerlingh Onnes and his collaborators Kuenen, Keesom, and Verschaffelt.
www.knaw.nl /waals/fluids.html   (270 words)

  
 Real Gases and the van der Waals Equation   (Site not responding. Last check: 2007-10-20)
Based on experiments on pure gases in his laboratory, van der Waals recognized that the variation of each gas from ideal behavior could be treated by introducing two additional terms into the ideal gas equation.
In the van der Waals equation the constant "a" is a correction term for intermolecular force and "b" is a correction for the real volume of the gas molecules.
Intermolecular forces are often lumped together and called van der Waals' forces in recognition of his being the first to recognize their existance.
neon.chem.uidaho.edu /~honors/real.html   (912 words)

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