pack 4- water

Question 1

what is water made of

Answer 1

2 hydrogen
1 oxygen
H2O

Question 2

what makes water polar

Answer 2

uneven distribution of charges
hydrogen is slightly positively charged
oxygen is slightly negatively charged

Question 3

how does water join to other water molecules

Answer 3

slightly positive ends attract to slightly negative ends
from hydrogen bonds between

Question 4

water loving

Answer 4

hydrophilic- can dissolve

Question 5

water hating

Answer 5

hydrophobic- cannot dissolve

Question 6

define specific heat capacity

Answer 6

amount of energy needed in joules to raise the temperature of 1cm3 of water by 1 degree C

Question 7

why does water have a high specific heat capacity

Answer 7

large amount of energy needed to break hydrogen bonds

Question 8

benefits of high specific heat capacity

Answer 8

animals can avoid rapid change of internal temp
maintain a steady temp when surroundings change- slow change

Question 9

what dissolves in water

Answer 9

ions and polar moleculesi

Question 10

is water a good solvent

Answer 10

yes