9 for test 4

Question 1

in extended response, include the statement that IMF

Answer 1

are forces off attraction between neighbouring molecules

Question 2

in extended response mention that covalent bonds

Answer 2

are within the molecule

Question 3

in extended response say dispersion forces occur

Answer 3

due to electron movement resulting in the formation of temporary dipoles

Question 4

a larger molar mass means

Answer 4

the strength of dispersion Increases

Question 5

DP-DP forces form due

Answer 5

to polar covalent bonds that’s chargers dont cancel out, resulting in permanent dipoles within molecules

Question 6

hydrogen bonding

Answer 6

stronger version of DP-DP due to the large electronegativity difference between O/F/N covalently bonded to H. The attractive force is between the strong positive region of hydrogen on one molecule to the electrons on a neighbouring molecule on O/F/N atom making a strong negative region

Question 7

water

Answer 7

is a higher polar molecule with a permanent dipole

Question 8

Hydrogen bond donation

Answer 8

A molecule donates a hydrogen bond when a hydrogen atom is bonded to a highly electronegative atom (O/F/N)

Question 9

hydrogen bond acceptance

Answer 9

A molecule accepts a hydrogen bond when it has non bonding pairs of electrons on an electronegative atom that can attract the hydrogen atoms from another molecule that are covalently bonded to O,F,N

Question 10

levels of dispersion forces

Answer 10

Low level
Moderate
Strong

Question 11

Lower vapour pressure means molecules

Answer 11

fewer molecules have energy to vapourise

Question 12

boiling point

Answer 12

temperature at which the IMF within a substance have been overcome, transitions from liquid to gas phase.

Question 13

condensation point

Answer 13

temperature at which a gas condenses into a liquid (equivalent to bpt but occurs in the reverse direction). substance looses enough energy that its IMF become strong enough to bring the molecules together to form a liquid.

Question 14

solutes that are soluble

Answer 14

have similar IMF present to solvents. sum of IMF between solute and solvent overcome existing forces of solvent to solvent and solute to solute

Question 15

A substance that has a relatively higher vapour pressure means IMF

Answer 15

Lower the sum of intermolecular forces as requires less energy to become a gas. VP is a measure of how easily it vapourises

Question 16

Increasing the temperature effect on VP

Answer 16

increases the VP by providing more molecules with sufficient kinetic energy to transition from liquid phase to gas.