Boiling point and Factors Effecting on boiling point | ch#5 | 9th Class chemistry

#9thclasschemistry #mpluschemisty 9th class chemistry online chemistry lecture 9th class 9th class chemistry lecture class 9 chemistry matric part 1 chemistry online lecture of chemistry 9th class physical states of matter in class 9 chemistry class 9th chemistry lecture series class 9 chemistry 9th class chemistry chapter 5 boiling point is defined as the temperature at which the vapour pressure of a liquid becomes equal to the atmospheric pressure or any external pressure The boiling point of the liquid depends upon the following factors. i. Nature of liquid: The polar liquids have higher boiling points than that of nonpolar liquids because polar liquids have strong intermolecular force. Boiling points of a few liquids are given in the table 5.2 ii. Intermolecular forces: Intermolecular forces play a very important role on the boiling point of liquids. Substances having stronger intermolecular forces have high boiling points, because such liquids attain a level of vapour pressure equal to external pressure at high temperature. It is given in figure 5.5. iii. External pressure: Boiling points of a liquid depends upon external pressure. Boiling point of a liquid is controlled by external pressure in such a way, that