Campbell Biology Ch 3.2

Front 1

4 Properties of Water- earth suitable for life

Back 1

1. Cohesion

2. Moderation of temperature

3. Expansion upon freezing

4. Versatility as a solvent

Front 2

binds a substance together

Back 2

Cohesion

Front 3

Contributes to transport of

H2O & dissolved nutrients

against gravity in plants

Back 3

Cohesion

Front 4

Clinging of one substance to another

Water adheres to walls of the cells,

countering the downward pull of gravity

Back 4

Adhesion

Front 5

Measure of how difficult it is stretch or break

the surface of a liquid

Behaves like an invisible film

Back 5

Surface Tension

Front 6

total amount of kinetic energy due to

molecular motion in a body of matter

depends on volume

Back 6

Heat

Front 7

measures the intensity of heat due to

the average kinetic energy of molecules

Back 7

Temperature

Front 8

amount of heat it takes to raise the

temp of 1 g of water by 1 °C

Back 8

Calorie(cal)

Front 9

1,000 cal, quantity of heat required

to raise the temp of 1 kg of water by 1 °C

Calories on food packages – actually kcals

Back 9

Kilocalorie (kcal)

Front 10

amt of heat that must be absorbed or lost for 1 g of that substance to change its temp by 1 °C

Back 10

Specific heat

Front 11

amount of heat that causes 1 g of water to change its temp by 1 °C

Back 11

cal

Front 12

1 cal / g / °C

Back 12

Water specific heat

Front 13

Why is H2O specific heat so high?

Back 13

H-bonding!!!!

Heat absorbed - break H-bonds

Heat released - forms H-bonds

Front 14

Quantity of heat a liquid must absorb for 1 g of it to be converted from the liquid to gas state

Back 14

Heat of Vaporization

Front 15

liquid that is completely homogeneous mixture of 2 or more substances

Back 15

Solution

Front 16

dissolving agent (water)

Back 16

Solvent

Front 17

substance that is dissolved (salt)

Back 17

Solute

Front 18

water is solvent

Back 18

Aqueous solution

Front 19

Nonionic polar molecules

Back 19

sugar molecules

Front 20

each individual atom has a charge

Back 20

Ionic compound

Front 21

charge difference throughout the molecule

Back 21

Polar molecule

Front 22

any substance with attraction to water (charges)

--Ionic or polar substances

--Dissolve in water

Back 22

Hydrophilic

Front 23

stable suspension of fine particles in a liquid

Back 23

Colloid

Front 24

Nonionic & nonpolar substances repel water

Back 24

Hydrophobic

Front 25

Charged molecules attracted to charged

molecules

Back 25

--Hydrophilic molecules

--Ionic substances

--Polar molecules- polar covalent bond

Front 26

Uncharged molecules attracted to uncharged molecules

Back 26

--Hydrophobic molecules

--Nonpolar molecules- nonpolar bonds

--NO charge

Front 27

"Like dissolves like"

Back 27

Polar substances WILL dissolve in Polar

substances

Non-polar substances WILL dissolve in

nonpolar substances

Non-polar substances WILL NOT dissolve in

polar substances.