Specific heat, heat of vaporization, and density of water

specific heat capacity

amnt of heat needed to raise temp of 1 gram of a substance by 1 degree C. water's is high because some heat has to go into breaking the H bonds b/w the molecules. Specific heat for water

heat of vaporization

amount of energy needed to change 1g of liquid substance to gas @ a constant temp. water's is high because, again, energy needs to be put into breaking those hydrogen bonds

Calorie

amount of heat to raise the temperature of 1g of water by 1 C.

temperature

average kinetic energy (energy of motion) of a group of molecules

density of ice and water

below freezing point of water, H bonds become fixed + lattice structure emerges. the molecules that are bonded are pretty far away so ice has a lower density than water. result: ice floats on water. this is important because layer of ice that forms above liquid water in the winter protects the plant life + animals in the pond from freezing by creating insulating effect.

importance of water's high HoV

evaporation of water molecules - > cooler surface due to EVAPORATIVE COOLING which occurs because molecules w/ highest kinetic energy are lost due to evaporation