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Pressure is a statistical mechanic variable, representing the force exerted on a unit surface by a body that is composed by a huge number of particles, sufficiently great to apply statistical methods to average the fluctuating force exerted in time due to the interaction of individual particles with the surface.
A molecule is not composed by a sufficient number of particle generally, and, more important, the chemical bonds composing it gives to the molecule an ordered structure, so that pressure cannot be rigorously defined talking about molecules.
In some application, when dealing with solutions of very big molecules, like proteins or polymers chains, the interaction of these big molecules with the solvent, for example water, is modelled as the interaction of a body constituted by several rigid sphere bonded together (the molecule) with a continuous background medium (the solvent). This approximation, that is called implicit solvent approximation, is allowed by the fact that the solvent molecules are much smaller than the solute molecules. In this context it is possible to say that the solvent exert a pressure on the molecule surface, that naturally depends on many parameters like temperature, density of the solution, and so on, besides the nature of solvent and solute.
This is however a simpling model, that is used only because frequently a fully molecular model, where both solvent and solute are represented as molecules populations, is too hard to be solved.
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What term refers to the movement of molecules from a higher concentration to an area of lower concentration?
Diffusion, a form of passive transport, is the movement of molecules from an area of greater concentration to an area of lower concentration. Osmosis is a special case involvement the movement of water from an area of higher concentration of water molecules to an area of lower concentration of water molecules. It takes place in all three states of matter-Solids, liquids and gases.
What is the process in which molecules move from an area where there are a lot of them to an area where there are a few of them in plants?
Molecules move from an area of higher concentraion to lower concentration by a process called "diffusion." When the molecules move from more to less concentration, it is called a "concentraiton gradient." When molecules move generally in one direction (towards one area), it is called "net direction."
What are Diffusions?
Duffision is when molecules diffuse (move) from an area of high concentration to an area of low concentration.
Is a low pressure area of loosely packed molecules?
Compression
What is the high pressure area of tightly packed molecules?
Rarefaction
Describe the characteristics of the winter climate of the northern mountain of Pakistan?
highpressure , dry wind erc
What is diffusion in cells?
diffusion- passive transport in cells where molecules move from an area where there are more molecules to an area of fewer molecules.
Diffusion is the movement of molecules from?
Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.
What kind of passive transport happens when molecules move from a area where there more molecules to an area where there are fewer?
Diffusion is the word you're looking for.
When molecules move from an area of high concentration to an area of low concentration they move with the?
molecules moves through concentration gradient .and molecules move either in the form of ions or gas in the medium
What is active trasportation?
active transportation is the movement of molecules from a less crowded area to a more crowded area. passive transportation is the movement of molecules from a more crowded area to a less crowned area.
Which terms refers to the movement of molecules from an area of higher concentration an area of lower concentration?
Diffusion, a form of passive transport, is the movement of molecules from an area of greater concentration to an area of lower concentration. Osmosis is a special case involvement the movement of water from an area of higher concentration of water molecules to an area of lower concentration of water molecules. It takes place in all three states of matter-Solids, liquids and gases.
Do molecules tend to move into area where there are more molecules?
Molecules tend to move into areas where there are less molecules. This is called diffusion and can happen with or without energy.
What term refers to the movement of molecules from a higher concentration to an area of lower concentration?
Diffusion, a form of passive transport, is the movement of molecules from an area of greater concentration to an area of lower concentration. Osmosis is a special case involvement the movement of water from an area of higher concentration of water molecules to an area of lower concentration of water molecules. It takes place in all three states of matter-Solids, liquids and gases.
Diffusion is the movement of molecules from an area of?
...greater concentration to an area of lesser concentration.
Diffusion is the movement of a substance?
from an area of high concentration to an area of lower concentration.
What is the process in which molecules move from an area where there are a lot of them to an area where there are a few of them in plants?
Molecules move from an area of higher concentraion to lower concentration by a process called "diffusion." When the molecules move from more to less concentration, it is called a "concentraiton gradient." When molecules move generally in one direction (towards one area), it is called "net direction."
