ch 3 & 4

Question 1

cohesion

Answer 1

attraction of molecules for other molecules of the same kind

hydrogen bonds in water

responsible for surface tension

Question 2

adhesion

Answer 2

clinging of one molecule to a different molecule

Question 3

capillary action

Answer 3

upward movement of water due to cohesion, adhesion, and surface tension

when ADHESION is GREATER than COHESION

Question 4

high specific heat

Answer 4

heat absorbed to break hydrogen bonds

heat releases to form hydrogen bonds

Question 5

evaporative cooling

Answer 5

water has high heat of vaporization

molecules with highest KE leave as gas

Question 6

importance of evaporative cooling

Answer 6

moderates climate

stabilizes temp in water

prevents overheating

prevents leaves from becoming too warm

Question 7

density (ice)

Answer 7

molecules move too slowly to break bonds when cooled

heat stays under ice

Question 8

organic compounds

Answer 8

contains carbon and hydrogen

Question 9

structural isomers

Answer 9

have different covalent arrangements of their atoms

Question 10

cis trans isomers (geometric)

Answer 10

have the same covalent binds but differ in spatial arrangements

Question 11

enantiomers

Answer 11

isomers that are mirror images of each other

Question 12

biomolecules vs macromolecules

Answer 12

biomolecules are macromolecules

not all macromolecules are biomolecules

Question 13

dehydration rxn

Answer 13

bonds two monomers with the loss of water

Question 14

hydrolysis

Answer 14

breaks bonds in polymer by adding water