What are vapourization and boiling point ? Explain the process of boiling of water.
What are vapourization and boiling point ? Explain the process of boiling of water.
On heating, when the ice gets converted into water and as we continue further heating, we shall see that temperature begins to rise. The temperature keeps on rising till it reaches nearly $100^{\circ} \mathrm{C}$ when it again becomes steady.
The heat supplied is now being utilised to change water from liquid state to vapour or gaseous state
The change of state from liquid to vapour (or gas) is called vaporisation.
It is observed that the temperature remains constant until the entire amount of the liquid is converted into vapour.
Both the liquid and vapour states of the substance coexist in thermal equilibrium, during the change of state from liquid to vapour.
The temperature at which the liquid and the vapour states of the substance coexist is called its boiling point.
The process of boiling of water:
Take a round-bottom flask, more than half filled with water.
Keep it over a burner and fix a thermometer and steam outlet through the cork of the flask. As water gets heated in the flask, note first that the air, which was dissolved in the water, will come out as small bubbles.
Similar Questions
The graph shows the variation of temperature $(T)$ of one kilogram of a material with the heat $(H)$ supplied to it. At $O,$ the substance is in the solid state. From the graph, we can conclude that
The graph shows the variation of temperature $(T)$ of one kilogram of a material with the heat $(H)$ supplied to it. At $O,$ the substance is in the solid state. From the graph, we can conclude that
The saturation vapour pressure of water at $100°C$ is ........ $mm$ of mercury
The saturation vapour pressure of water at $100°C$ is ........ $mm$ of mercury
A thermally insulted vessel contains $150\, g$ of water at $0\,^oC$. Then the air from the vessel is pumped out a adiabatically. A fraction of water turns into ice and the rest evaporates at $0\,^oC$ itself. The mass of evaporated water will be closes to ....... $g$ (Latent heat of vaporization of water $= 2.10 \times10^6\, Jkg^{-1}$ and Laten heat of Fusion of water $ = 3.36 \times10^5\,Jkg^{-1}$ )
A thermally insulted vessel contains $150\, g$ of water at $0\,^oC$. Then the air from the vessel is pumped out a adiabatically. A fraction of water turns into ice and the rest evaporates at $0\,^oC$ itself. The mass of evaporated water will be closes to ....... $g$ (Latent heat of vaporization of water $= 2.10 \times10^6\, Jkg^{-1}$ and Laten heat of Fusion of water $ = 3.36 \times10^5\,Jkg^{-1}$ )
- [JEE MAIN 2019]
At atmospheric pressure, the water boils at $100°C$. If pressure is reduced, it will boil at
At atmospheric pressure, the water boils at $100°C$. If pressure is reduced, it will boil at
Why skating is possible on ice ?
Why skating is possible on ice ?