Is mercury adhesive or cohesive?
Mercury has very small adhesive forces with most container materials, and strong cohesive forces. Little drops of mercury will form into almost spheres when spilled on most surfaces (gravity will bend them out of shape).
Why is mercury so cohesive?
As mercury is a metal, the bonds between the molecules are metal bonds that are much stronger than the hydrogen bonds leading to very high cohesive forces and high surface tension.
What are cohesive and adhesive forces give examples?
When a glass surface is poured with water, both adhesive and the cohesive forces act on the surface of the water. A strong adhesive force tends the liquid to spread over the surface whereas a strong cohesive force is responsible for the formation of water droplets on the water surface.
What does adhesion and cohesion mean?
Cohesion and adhesion are two water properties that describe how water molecules interact with each other. and how water molecules interact with other things like leaves or even you. Cohesion means that water likes to stick to itself. and adhesion means that water likes to stick to other things.
What is the cohesive force of mercury?
Mercury does not wet glass – the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass. When liquid mercury is confined in a tube, its surface (meniscus) has a convex shape because the cohesive forces in liquid mercury tend to draw it into a drop.
What is meniscus of mercury?
Detailed Description. Water meniscus is concave, mercury meniscus is convex. A meniscus can go up or down. It all depends on if the molecules of the liquid are more attracted to the outside material or to themselves.
What is coherence cohesion?
Coherence is defined as the quality of being logical, consistent and able to be understood. Imagine coherence as a building (It’s an analogy, go with it). Cohesion on the other hand refers to the act of forming a whole unit. It is effectively a subset of coherence.
Why meniscus for mercury is different?
Formation of a Meniscus When liquid water is confined in a tube, its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass – the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.
What is the difference between coherence and cohesion with examples?