vapour pressure substance

Vapour Pressure of Liquids - 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 gi..

. 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 ..

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

Solid-Vapour Equilibrium - When substances get sublimated,the solid gets converted into vapour without passing through the liquid phase.Sublimation thus involves solid vapour equilibrium. On cooling the vapours, the solid is given back. This equilib..

Hygroscopic substances are those substances that absorb water vapour from the air. The process is called Hygroscopici..

Hygroscopic substances are those substances that absorb water vapour from the air. The process is called Hygroscopicit..

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..

The change of pressure has effect only on those equilibria which involve gaseous substances and proceed with a change in the number of moles of the gases. According to Le-Chatelier's principle, increase of external pressure should affect the equilibrium in such a way ..

Heat is a very powerful form of energy. Although there are other forms of energy like light and electricity, heat is the most commonly used agent for initiating all chemical changes. Various classes of substances undergo decomposition to various extents when heated. This process is known ..

According to the Le Chatelier's principle, this will make the reaction move in a direction which absorbs heat i.e., the endothermic process will be favoured. As vaporization (liquid g vapours) is an endothermic process, a rise in temperature will favour the process of vaporization i.e. m..