Chapter 10- Water as a unique chemical

Question 1

what states can water be found in

Answer 1

solid liquid and gas

Question 2

how are molecules organized in water in a solid state

Answer 2

a regular way but can vibrate in s fixed position

Question 3

how are molecules organized in water in a liquid state

Answer 3

molecules are fairly close together but can move around each other

Question 4

how are molecules organized in water in a gas state

Answer 4

molecules are far apart and aren’t bonded. arranged disorganized and move around rapidly in different directions

Question 5

what is sublimation

Answer 5

when a solid transitions from solid to gas without becoming a liquid

Question 6

what is deposition

Answer 6

when a gas transitions to a solid without becoming a liquid

Question 7

what is potable water

Answer 7

water that is suitable for drinking

Question 8

what is one special property of water

Answer 8

it can do hydrogen bonding

Question 9

what are the trends in group 16 hydrides

Answer 9

elements in this group can bond with hydrogen to form hydrides

Question 10

what is waters melting point

Answer 10

0 degrees

Question 11

what is waters boiling point

Answer 11

100 degrees

Question 12

why does ice float in liquid water

Answer 12

ice has a lower density

Question 13

what is density a measurement of

Answer 13

the mass of a substance

Question 14

how to calculate density

Answer 14

density= mass(g) / volume (cm cubed)

Question 15

what is heat capacity

Answer 15

a measure of a substances ability to absorb and store heat energy

Question 16

what is specific heat capacity

Answer 16

a measure of the energy required to raise 1g of substance by 1 degrees

Question 17

how is specific heat capcity reported

Answer 17

in units of J g-1 degrees celcius

Question 18

what is latent heat

Answer 18

the energy absorbed by 1 mole of substance as it changes state from solid to liquid and liquid to gas

Question 19

what are the two types of latent heat

Answer 19

latent heat fusion and latent heat vaporisation

Question 20

what is the latent heat of fusion of water

Answer 20

6

Question 21

what is the latent heat of vaporization of water

Answer 21

40.7

Question 22

how to calculate latent heat

Answer 22

heat energy in kJ= amount of substance (in mol) x latent heat value
q= n x L