water vapour pressure

If a liquid is placed in an open vessel, there is complete escape of molecules from the liquid to the atmosphere. If a liquid is allowed to evaporate in a closed vessel, the molecules escaping from the liquid surface are collected in a vapour state, above the surface of the liquid within..

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..

Equilibrium between a liquid and its vapours can be represented by the equation...

Ordinary air seems to be dry. It does not cause wetness on our body or clothes. However, you may have some idea about the huge quantity of rain, snow, dew, etc. that gets formed in a year throughout the world. All of it comes only from the air. Thus, the apparent dryness of air is very deceptive. A..

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 vapours of the liquid held in an open con..

An increase in pressure increases the solubility of a gas. For example, aerated water bottles contain carbon dioxide gas under pressure..

Some chemical reactions need very high pressure to proceed. For e.g., in the commercial manufacture of ammonia from nitrogen and hydrogen by Haber's process, a pressure of over 200 atmosphere is required, in presence of a catalyst iron and a temperature of 450oC to 500..

An increase in pressure increases the solubility of a gas. For example, aerated water bottles contain carbon dioxide gas under pressure..

) Why a person should lie down flat on thin ice (2) Rear wheels of buses and trucks are usually double. Similarly tanks and bulldozer's are fitted with caterpillar tracks rather than wheels and huge buildings and dams have wide bases. On the other hand, there are many applications which r..

Lower the atmospheric pressure, higher is the rate of transpiration. Water Movement through the leaf to the atmosphere in the form of vapour..