Chapter 3: H2O + Life

Question 1

cohesion

Answer 1

molecule attracts its neighbor and is due to surface tension

Question 2

surface tension

Answer 2

a pulling force due to the attraction between water molecules that minimizes surface area which forms water drops. the h-bonds hold the molecules so tight it makes the surface hard

Question 3

adhesion

Answer 3

polarity of water allows it to attract other substances

Question 4

density of water in solid and liquid form

Answer 4

water in ice form is LESS dense than liquid form so it floats which prevents the solidification of oceans. water molecules are further away from each other in ice form

Question 5

temperature of water

Answer 5

water has high specific heat so it can absorb/release heat with small changes in temperature which helps with the breaking/forming of bonds.
HEAT ABSORB = BOND BREAK
HEAT RELEASE = BOND FORM

Question 6

kinetic energy

Answer 6

energy in motion

Question 7

thermal energy

Answer 7

KE associated with random movement

Question 8

temperature

Answer 8

related to average KE

Question 9

1 Joule

Answer 9

1 J = 0.239cal/4.184J in 1cal

Question 10

evaporation

Answer 10

transforms liquid to gas and evaporative cooling reduced temp caused by evaporation

Question 11

solution

Answer 11

mix of two or more evenly distributed substances

Question 12

solvent

Answer 12

liquid dissolving solute

Question 13

solute

Answer 13

one or more substances dissolved in solvent

Question 14

aqueous solution

Answer 14

water is solvent

Question 15

hydration shell

Answer 15

water molecules surrounds an ionic compound when it gets dissolved