|Class 11 Chemistry Chemical Bonding Structure||Hydrogen bonding|
Hydrogen bond is formed when hydrogen is attached to some electronegative element like O, N and F. It forma a special bond with them called as hydrogen bond.
Types of Hydrogen bond
Intermolecular Hydrogen bond: It is a bond formed between two different molecules.
Intra-molecular Hydrogen bond: A bond that is formed within the molecule.
Consequences of Hydrogen bonding:
Hydrogen bonding in ice and water
The structure of Ice is given below :
Water has maximum density at 4 degree Celsius:
This is seen because at zero degrees Celsius the water is ice. Now, if we start increasing its temperature gradually, we see that the cage of ice starts breaking. Due to it, hollow space starts getting filled. H-bonds break therefore, density increases.
At 4 degree Celsius, kinetic energy of molecules starts increasing and they start moving away due to which density decreases.