Chapter 3 Flashcards
Water and Life
Delta Symbol Meaning
partial
Human Body Temp.
37 degrees C, and 98.6 degrees F
Cohesion
Water molecule stick to other water molecule
Adhesion
Water molecule temporary sticking to tube/container it’s in.
Specific heat
Amount of heat a substance requires to increase temp. of 1 gram by 1 degree C
Calorie
Specific heat of water.
Mol
A measurement. 6.022 * 10^23 atoms. Avogadro’s number.
Molarity (M)
Mols over Litres
pH scale
Measurement of concentration of H+ ions. A log based scale. Lower numbers = higher acidity, higher numbers = higher basic.
0-14
Blood (Mammal) pH
7.35-7.45.
pH 4
10^-4 M of H+
10^-10 M of OH-
Buffers
Accept or send out H+ ions.
Surface tension
Cohesion due to h-bonding adds a measure of how difficult it is to stretch or break the surface of a liquid
Kinetic Energy
Anything that moves
Thermal energy
Total kinetic energy
Heat
Thermal energy transferring from one body to another
Temperature
Avg. kinetic energy
Heat of Vaporization
Quantity of heat absorbed by a body of liquid for 1g of it to convert to gas.
Evaporation Cooling
As liquid evaporates, cool water is left behind.
Ice insulates
Lighter than water, otherwise oceans would freeze through. Water is most dense at 4 degrees C.
Solutions
Completely homogenous of 2 or more liquids
Solvent
Dissolving Agent, commonly water.
Solute
Thing being dissolved.
Aqueous Solution
A solution in which a solute is dissolved in water
Hydration Shell
Sphere of water molecules around each dissolved ion
Hydrophilic substance
Water loving
Hydrophobic
Dislikes water
Colloid
A group of microparticles that’re insoluble. Suspended in a substance of water.
