water and its functions Flashcards
1
Q
why is a water molecule polar
A
oxygen has a slight negative charge and hydrogen has a slight positive charge
2
Q
what forces act between water molecules
A
hydrogen bonds
3
Q
why does water have a high specific heat capacity
A
hydrogen bonding between molecules are very strong and require a lot of energy to break
4
Q
what is latent heat of vaportisation
A
the amount of energy to evaporate 1 gram of water
5
Q
what is cohesion
A
hydrogen bonding between molecules allows them to stick together giving water large cohesive forces and allows it to be pulled up the xylem without separating
6
Q
what is surface tension
A
when water molecules meet the air they are pulled back into the water - means the surface of water acts like a skin
7
Q
A
