State 2 ways in which a liquid changes to vapour.Differentiate between them.
State 2 ways in which a liquid changes to vapour.Differentiate between them.
The two ways in which the liquid changes into vapour are vapourisation and evaporation.
Let us first begin by vapourisation, Here the entire mass of the liquid, on reaching the boiling point gets converted into vapour state. This is because of the thermal energy gained by the molecules of the liquid. This energy is passed to the rest of the molecules and the whole liquid gets converted into gaseous state.
In case of evaporation, no excess heat energy is supplied. It takes place at room temperature. The surface molecules of the liquid gain energy and get converted into vapour .
Hence we can say that vaporization is a bulk phenomenon and evaporation is a surface phenomenon.
The two ways in which the liquid changes into vapour are vapourisation and evaporation.
Let us first begin by vapourisation, Here the entire mass of the liquid, on reaching the boiling point gets converted into vapour state. This is because of the thermal energy gained by the molecules of the liquid. This energy is passed to the rest of the molecules and the whole liquid gets converted into gaseous state.
In case of evaporation, no excess heat energy is supplied. It takes place at room temperature. The surface molecules of the liquid gain energy and get converted into vapour .
Hence we can say that vaporization is a bulk phenomenon and evaporation is a surface phenomenon.
