CH 10- Water

How much water is drinkable globally?

2.6% of water on the planet is fresh and 1.2% of that is surface water that is readily available

Why does water have a high melting and boiling point?

the intermolecular hydrogen bonds are very strong because of the large electronegativity difference between the atoms

What are the trends in boiling points of group 16 hydrides?

they are group 16 elements that can bond with hydrogen, their boiling points increase as the molar mass increases

Density of ice vs water

when water freezes, each water molecule forms hydrogen bonds with four other water molecules resulting in a hexagonal arrangement of molecules that are more widely spaced apart therefore less dense

What is latent heat fusion of water?

amount of energy required to change water from solid to liquid. 6.0kJmol-1

What is latent heat of vaporisation?

the amount of energy to change water from a liquid to a gas

How does water high latent heat of vaporisation impact aquatic life?

it means the oceans can absorb huge amounts of heat with minimal temperature change. this stabilises marine environments, preventing drastic temperature swings, creating a more consistent habitat for aquatic life

How does climate change effect aquatic life? (+ 3 results)

as global temperatures rise, waters ability to moderate the climate is reduced. This results in increased rainfall, more severe storms and increased sea temperature