vapour pressure


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"Vapour pressure" Introduction


From   Wikipedia , TutorVista
Wikipedia
Vapour pressure of water - Vapour pressure of water is the Vapour pressure (or equilibrium/saturation pressure) of water, i.e., the pressure exerted by water at a specific temperature. It is important in many experiments, particularly experiments relating to gases. A common classroom experiment in which the vapour pressure..

Vapour pressure of water - The vapour pressure of water is the vapour pressure (or equilibrium/saturation pressure) of water, i.e., the pressure exerted by water at a specific temperature. It is important in many experiments, particularly experiments relating to gases. A common classroom experiment in which the vapour..

TutorVista
Vapour pressure
. In such a state, although the amount of liquid level in the vessel does not change, evaporation has not stopped and the system is not at rest. In fact, the number of molecules, which escape from the liquid to the gaseous phase (due to evaporation), becomes equal to the number of vapour ..
Vapour Pressure of Liquids
vapour pressure using manometer Vapour pressure is defined as the partial pressure exerted by the vapors above the liquid surface in equilibrium with liquid at a given temperature. fig 3.3 In illustrations 1a and 1b, the liquid and vapor states of a given substance are represented. The individual mol..
Vapour Density
Vapour density is the ratio of the mass of a volume of a gas, to the mass of an equal volume of hydrogen, measured under the same conditions of temperature and pressure. According to Avogadro's law, equal volumes of all gases contain equal number of molecules. Thus, let the n..
Liquid-Gas (vapour) Equilibrium
Liquid-Gas (vapour) Equilibrium - When a liquid is placed in an open container it disappears completely after some time. However, when the same liquid is placed in a closed container, even after a long period only a part of the liquid disappears. The obvious difference is that the va..

"Vapour pressure" Videos


From   Youtube
  Vapour Pressure/Enthalpy of VaporisationThie video outlines a method for determining the enthalpy of vaporisation of ethanol by measuring the vapour pressure (for Southampton University chemistry students).
  1. What could be a practical application for lowering the vapor pressure of a liquid?remainder of the container. If the vessel is ruptured for example, due to corrosion, or failure under pressure the vapour portion may rapidly leak, lowering the pressure inside the container. This sudden drop in pressure inside the container causes violent boiling of the liquid, which rapidly liberates large amounts of vapour in the process. The pressure of this vapour can be extremely high, causing a significant wave of overpressure (an explosion) which may completely destroy the ...

"Vapour pressure" Questions & Answers


From   Yahoo Answers
Question : Hello all, Iam making a project in my college and i need toincrease the pressure of water vapour in a chamber so that it enters the other chamber in such a way that the shaft rotates at a high speed leading to the rotation of the dynamo. Please suggest me some gadget which i cud use to increase the pressure.

Answer : hi there are tow type of highing water vapore presure . first: boiling point = is the temerture of water when the vapore presure = environoment presure , ok 1- you can boil water from the high location such as hell or amountain , becouse the presure from there is low and it need low temp..., if you boil water from the low location you need high temp .. becouse the presure from there is high . 2- there many of sabistant or materal cause of increasing the boiling point of water for example : when we add the salt in to water the boiling point of water is increas too becouse there are direct relation between them , it mean when we add the salt in to the water the pressure of water vapuor increase . notes : boiling point = (water vapuor pressure = environoment pressure) thanks with regard

Question : When Absolute pressure of water goes below vapour pressure its start boiling why?

Answer : because there is air in the water. When the pressure is less outside the water than inside the water, the air wants to escape, hence the bubbling (boiling) of the water. This is very easily seen in soda. You open the cap to a bottle, and tiny bubbles all come to the surface. The pressure is trying to equalize as quick as possible.

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