Vapour example sentences

However, the rate of increase in pressure decreases with time due to condensation of vapour into water.You have seen how the water evaporates from the water bodies and subsequent condensation of this water vapour leads to rain.For any pure liquid at atmospheric pressure ( 013 bar) the temperature at which the liquid and vapours are at equilibrium is called boiling point of the liquid.The sooty material formed by condensation of vapourised Cn small molecules consists of mainly C60 with smaller quantity of C70 and traces of fullerenes consisting of even number of carbon atoms up to 350 or above.Let us now consider the systems where solids sublime to vapour phase.It is a mixture of many gases like nitrogen, oxygen, carbon dioxide and water vapour.When the water vapour cools down, it condenses and forms clouds.Some amount of water vapour also get into the atmosphere because of various biological activities.As a consequence the rate of condensation from vapour to liquid state is much less than the rate of evaporation.Hence solid iodine sublimes to give iodine vapour and the iodine vapour condenses to give solid iodine.If we place solid iodine in a closed vessel, after sometime the vessel gets filled up with violet vapour and the intensity of colour increases with time.When the number of molecules leaving the liquid to vapour equals the number of molecules returning to the liquid from vapour, equilibrium is said to be attained and is dynamic in nature.Trees take in water from their roots and release water vapour into the air through evaporation.This cooling causes the water vapour in the air to condense in the form of tiny droplets.What causes the movement of air, and what decides whether this movement will be in the form of a gentle breeze, a strong wind or a terrible storm? What brings us the welcome rains? All these phenomena are the result of changes that take place in our atmosphere due to the heating of air and the formation of water vapour.