* Polarity: Water molecules are polar, meaning they have a slightly positive end (the hydrogen atoms) and a slightly negative end (the oxygen atom). This is due to the uneven sharing of electrons in the molecule.
* Hydrogen Bonding: The positive end of one water molecule (hydrogen) is attracted to the negative end of another water molecule (oxygen). This attraction is called a hydrogen bond, which is a strong type of intermolecular force.
Consequences of Cohesion:
* High surface tension: Water molecules at the surface are strongly attracted to each other, creating a high surface tension that allows insects to walk on water.
* High boiling point: The hydrogen bonds hold water molecules together, requiring a significant amount of energy to break these bonds and turn water into vapor.
* Capillary action: Water molecules are attracted to the walls of narrow tubes, allowing water to move upwards against gravity, as seen in plants.
* Solvent properties: The polar nature of water allows it to dissolve many ionic and polar compounds, making it an excellent solvent.
In summary, the cohesive nature of water is due to the strong hydrogen bonds between its molecules. This property has significant implications for the physical and biological properties of water.
