Intermolecular Forces

Question 1

LDF

Answer 1

exist between all molecules, polar and nonpolar. Weakest IMF.

Question 2

as mass/molecule size increase, LDF _______

Answer 2

Gets stronger

Question 3

LDF is the reason why

Answer 3

Nonpolar molecules can condense at a low temp

Question 4

Formation of Temporary/instantaneous dipole

Answer 4

The electrons are like mobile clouds of negative charge that at any moment the e- density could be greater over one region of the atom or molecule (formation of temporary dipole) which may cause a neighboring atoms’ e- to be disrupted.

Question 5

Dipole-dipole

Answer 5

between polar molecules, opposite charges in neighboring molecules attract each other

Question 6

The greater the polarity….

Answer 6

The greater the dipole-dipole

Question 7

Solubility

Answer 7

Like dissolves like, polar and nonpolar don’t mix. Water is polar, and the more places for H-bonding, the more soluble in water.

Question 8

Conductivity

Answer 8

Covalent molecules don’t conduct due to no mobile ions and fixed e-

Question 9

Mpt/Bpt

Answer 9

Strong IMF –> High Mpt/Bpt

Question 10

Hydrogen bonding

Answer 10

Between molecules that have H bonded to F, O or N. (small atoms with high electronegativity) Very strong dipoles and high Bpts.