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You can use van der Waals forces to explain the differences in boiling points, etc. for various compounds.
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How do you solve for n in the Van Der Waals equation?
In short just use algebra to get the equation below Start with [P + a*(n/V)^2] * (V - nb) = nRT which is the standard Van Der Waals equation and solve for n using algebra. which gives the 3rd order equation below. -(ab/V^2)*n^3 + (a/V)*n^2 - (bP+RT)*n + PV = 0 The simplest way to solve this equation is to enter it into Excel and graph it with multible values of n from 0 to whatever gets you to zero. The value that gives you zero is the answer. Be sure you use all the proper units for the other varables. Hope this helps.
How do intermolecular forces affects solvation?
This can be a very complex question that you might be able to use some high end computational chemistry codes. But simply put you have van der waals forces, hydrogen bonding, and ionic bonding. You can think of it like coulumbic repulsion and attraction. hydrogen bonding has a slight negative charge on the oxygen and a slight positive charge on the hydrogen due to the covalent bond and the electron spending more time on the oxygen than the hydrogen, and the oxygens lone pair of electrons (this is inside a water molecule). Outside of the water molecule you dissolve salt nacl = na+, cl- . Since water has a slight negative charge on the oxygen, the oxygens in water molecules surround the Na+ atom pulling it into solution, and the hydrogen slight positive charge surrounds the chlorine anion. generally speaking polar groups like alcohols, ketones, amines,carboxylic acids are water soluble due to hydrogen bonding as long as there is not a large nonpolar R group. Van der waals forces control solubility on oily substances, those with large R groups like oil. since oil is a long chain of carbon it is very covalent with only very small positive and negative charges compared to water. That is why it is impossible to dissolve oil and water. Soap on the other hand has an oily R group bonded to a polar head. so one part of the molecule is polar (hydrogen bonding), and the other is non-polar and oily. A soap molecule can homogenize a solution of water and oil by being the bridge between the water molecule and the oil molecule. Hope this helps.
Why is the boiling point of GeH4 higher than SiH4?
Boiling point of SiCl4 is lower than expected. Its chlorine atoms have higher negative charge due to lower electro negativity of silicon. Therefore the molecules repel each other. this results in lower b.p of SiCl4
Why you use sodium lamp in polarimeter?
it is highly monochromatic . all standard results are in 589nm . so Na is used if you use a filter then der no other wavelength than 589 &589.6nm
Which of the following best describes the tactics eisnhower and dulles preferred to use to deal with threats abroad?
reducing the size of armed forces.....APEX
What are the role of Van der Waals interactions in biological molecules?
(W. Kohn, G. Tiana) Density functional Theory (DFT), in principle, includes Van der Waals energies, but approximations rooted in the local density approximation (LDA), such as generalized gradient approximations (GGAs) do not. Recent and ongoing work tries to use time-dependent density functional theory to calculate Van der Waals attractions between two systems of interacting atoms (molecules, clusters, solids, etc.) of arbitrary size, shape and composition.
How are plastic polymers joined together?
Do you mean at the molecular level (covalent and ionic bonds, and van der Waals forces take care of this), or do you have two plastic parts you want to join together? If it's the second... you can use adhesivesyou can use fastenersyou can weld them togetheryou can design the two objects so they mateor you can cast the second piece around the first one.
Leonardo da vincis use of composition in his paintings was influenced by what other renaissance artist?
Van der Weyden
Are Van Der Graff generators suitable for home use?
Van Der Graff generators are suitable for home use. For someone who is mechanically savvy there are several guides available online that can help you construct your own Van Der Graff generator for home experiments and fun. Van Der Graff generators are more designed for commercial use,they are very pwoerful. I would not recomend using a Van Der Graff generators in a home.
How do oil companies use cracking isomerisation and reforming to process fractions from crude oil?
Cracking, isomerisation and reforming are usually used to make smaller branched alkanes from the long-chained alkanes. Small branched alkanes can not pack as closely together, so they have weak Van der Waals forces. It means that the products will have low boiling points and are better fuels as they burn more easily.
What gloves does van der sar use?
Goalkeeper gloves
How do you solve for n in the Van Der Waals equation?
In short just use algebra to get the equation below Start with [P + a*(n/V)^2] * (V - nb) = nRT which is the standard Van Der Waals equation and solve for n using algebra. which gives the 3rd order equation below. -(ab/V^2)*n^3 + (a/V)*n^2 - (bP+RT)*n + PV = 0 The simplest way to solve this equation is to enter it into Excel and graph it with multible values of n from 0 to whatever gets you to zero. The value that gives you zero is the answer. Be sure you use all the proper units for the other varables. Hope this helps.
What has the author C Van Der Burgh written?
C. Van Der Burgh has written: 'The aetiology of drug use' -- subject(s): Drug abuse, Research
How do you calculate joule kelvin inversion temperature of hydrogen?
use the T=2a/(bk) equation shown in the first link, plugging in a and b values found in the second link. proofs are shown in the joule-thomson expansion wikipedia page as well as the van der waals equation of state page.
Do crested geckos have suction cups?
Crested geckos have millions of fine hair like structures on the bottom of their feet called setae. These millions of setae use the van der walls force in order to use molecular forces to grab and pull to surfaces..
What has the author Wouter Jacob van der Velde written?
Wouter Jacob van der Velde has written: 'Smoking in pregnancy' -- subject(s): Effect of Tobacco on, Fetus, Physiology, Pregnant women, Tobacco use
What element has the smallest atomic radius?
Helium usually is listed with the smallest atomic radius when calculated. Hydrogen however has a smaller van der Waals radius The protium isotope of hydrogen has the smallest nucleus radius. It is 1.6 fm
