Cohésion et adhésion sont des termes souvent confondus. The addition of substances called surfactants can reduce the surface tension of a liquid. Intermolecular forces act also between two dissimilar substances in contact, a phenomenon called adhesion.These forces originate principally because of coulomb (electrical) forces. As for paint - the binder (which is effectively glue) holds it together, holds the pigment in, and sticks it to the wall - the binders are usually/often long chain polymers which will be sticking primarily by adhesive forces, as well as interlocking, in addition to cohesion. For example, adding detergent to water decreases its surface tension. By using ThoughtCo, you accept our, Surface Tension - Definition and Experiments, The Different Meanings of Meniscus in Science, Water Properties and Facts You Should Know, How to Perform the Pepper and Water Science Magic Trick, intermolecular forces between the liquid's, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. Highly recommend this link as a source!!!! An incoherent talk or blog post is one that doesn't "hang together;" and if the police pick up someone who they describe as incoherent, it means he or she isn't making sense. Following several discussions in past years, these subpages are now deprecated. Specifically the paragraph has it right when it says, The construction industry uses many materials that undergo a phase transition. At the interface between a liquid and the atmosphere (usually air), the liquid molecules are more attracted to each other than they are to the air molecules. --Gabycs 01:36, 24 March 2007 (UTC), this definately needs to be double checked against a chemistry book. :) Thanks! Send us feedback. Sorry, I don't know much about chemistry, so I may be wrong... suzumebachi٭secret 18:37, 14 July 2009 (UTC). Alors que la cohésion fait référence à l’attraction entre molécules du même type, l’adhésion désigne l’attraction entre deux types de molécules. I think a rewrite explaining the need for cohesion to hold together the bulk of polycrystalline materials like plaster of paris, fire bricks is necessary - though it requires citations - specifically proof that the cohesive force is the major force. 'Nip it in the butt' or 'Nip it in the bud'? If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. 83.100.250.79 (talk) 19:10, 14 July 2009 (UTC), That's a good idea,actually adhension and cohesion are co-related,and if we can understand one better,other can be understood nicely.And it seems easy to contrast and compare between two. That idea sucks — Preceding unsigned comment added by 71.190.202.21 (talk) 20:11, 9 December 2011 (UTC), No, this is an awful idea. The comment(s) below were originally left at Talk:Cohesion (chemistry)/Comments, and are posted here for posterity. Needs a LOT of work. Paint typically does not require as much cohesion as caulking, as paint is applied much more thinly. The net effect of cohesion versus adhesion is that there is an inward force at the surface layer. Yet, there’s something to be said for a sense of, Similar to the way people experience stages of grief, pandemics have a predictable pattern of psychological processing, experts said: An early sense of heroism and community, Tom Brady's departure from New England likely signals no team will benefit more from longstanding, With no on-field offseason programs, no preseason games, no extensive hitting in training camps, chaos rather than, Students are now often saddled with abhorrently misleading versions of American history that threaten social, But this in-person mandate was also partially because face-to-face interactions were seen as essential to organizational, One likely reason, Vogt said, for the correlation between countries experiencing greater longevity in the presence of financial transfers was that those countries exhibited stronger social, Post the Definition of cohesion to Facebook, Share the Definition of cohesion on Twitter, 'Cordial': A Word Straight from the Heart. In other words, the force of cohesion is greater than the force of adhesion.
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