chapter 10 section 5

Question 1

what is the approximate angle between two hydrogen oxygen bonds in water

Answer 1

105

Question 2

the bond between oxygen and hydrogen in a water molecule is

Answer 2

polar covalent

Question 3

the molecular geometry of a water molecule is

Answer 3

bent

Question 4

liquid water forms molecular groups. how many molecules of water are there in each group

Answer 4

four to eight

Question 5

if water molecules were not linked by hydrogen bonds to form groups in liquid water, what would be the physical state of water at room temperature

Answer 5

gas

Question 6

what is the reason for the relatively low density of ice

Answer 6

empty spaces between molecules

Question 7

compared with nonpolar substances of comparable molecular mass, waters molar enthalpy of vaporization is

Answer 7

higher

Question 8

water’s relatively high boiling point is the result of

Answer 8

hydrogen bonding

Question 9

the molar enthalpy of fusion of ice is

Answer 9

larger than the enthalpy of many other solids

Question 10

compared with the boiling point of nonpolar substances of comparable molar mass at 1 atm, the boiling point of water at 1 atm is

Answer 10

higher