Examples of cohesion in the following topics:
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- When attractive forces occur between like molecules, they are referred to as cohesive forces, or resulting in cohesion, because they hold the molecules of sample close together.
- These cohesive forces are especially strong at the surface of a liquid, resulting in the phenomenon of surface tension.
- For example, the hydrogen bonds between water molecules are responsible for the cohesion observed in water droplets.
- It occurs when the intermolecular attractive forces between the liquid and the solid surrounding surfaces (adhesive forces) are stronger than the cohesive forces within the liquid.
- A convex meniscus occurs when the molecules have a stronger attraction to each other (cohesion) than to the material of the container (adhesion), causing the surface of the liquid to cave downward.
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- Therefore, the cohesive forces result in the phenomenon of surface tension.
- Although easily deformed, droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer.
- This property is caused by cohesion of similar molecules and is responsible for many of the behaviors of liquids.
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- These properties are due to metallic bonding by delocalized d electrons, leading to cohesion which increases with the number of shared electrons.
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- Early atomic theory attempted to explain properties of matter by assigning attributes to atoms that might match the attributes of the various matter they combined to form, such as slipperiness, liquidity, color, and cohesiveness.
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- In another setting, we judge the quality of a sauce by the way it flows and adheres to certain foods - salad dressing to lettuce, jam or jelly to toast, ketchup or mayonnaise to fried foods - the flow and cohesion are related to the viscosity.