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Nov 16, 2017 · If we put a liquid in a closed container in contact with a volume of gas, some of that liquid will vapourise, or move to the gaseous phase. This is due to the movement and kinetic energy of the liquid causing molecules to ‘jump’ from the surface.
Learn about and revise particle motion, gas pressure and the relationship between pressure and volume with GCSE Bitesize Combined Science.
The molecules that have left the surface are said to be in the vapour state. The difference between a vapour and a gas is purely one of temperature, a vapour being a gas below its critical temperature. This phenomenon is known as evaporation.
Apr 24, 2021 · Vapor pressure (or vapour pressure) is the equilibrium pressure of a vapor above its liquid or solid state in a closed container. In this type of closed system, some molecules of a liquid or solid have enough kinetic energy to escape at the surface and enter the vapor (gas) phase.
Vapour pressure, also known as vapour equilibrium pressure, can be defined as the pressure exerted (in a system featuring thermodynamic equilibrium) by a vapour with its condensed phases (solid or liquid) in a closed system at a given temperature.
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- A liquid’s vapour pressure is a vapour’s equilibrium pressure above its liquid (or solid); that is, the vapour pressure resulting from a liquid (or...
- Raoult’s law is a chemical law that relates the solution’s vapour pressure to the mole fraction of a solution added. The law of Raoult is expressed...
- When a liquid’s vapour pressure is the same as the atmospheric pressure, the material is at temperature and pressure at the boiling/freezing point....
- As a result, there are lower boiling points of liquids with high vapour pressure. By heating a liquid and allowing more molecules to enter the atmo...
- The material with the lowest boiling point would, therefore, have the highest vapour pressure at room temperature (the easiest way to reach the gas...
Apr 9, 2023 · Interesting Science Videos. What is vapour pressure? The pressure exerted by the vapour (molecules in the vapour phase) over the surface of the liquid at the equilibrium at a given temperature is called the vapour pressure of the liquid. Vapour Pressure Illustration.
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Vapor pressure [a] or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's thermodynamic tendency to evaporate.
