Intermolecular Forces

Question 1

Rank these in order of strength: covalent bond, dipole-dipole, london dispersion, hydrogen bonding

Answer 1

covalent bond, hydrogen bond, dipole-dipole, london dispersion

Question 2

What is the intermolecular force present in HCl?

Answer 2

dipole-dipole

Question 3

What is the phase change of a solid to a liquid?

Answer 3

melting

Question 4

What is the boiling point of this substance at 1 ATM of pressure?

Answer 4

100 degrees

Question 5

Hydrogen Bonding

Answer 5

A special case of strong dipole-dipole interactions occur when a hydrogen atom bonded to a highly electronegative atom of one molecule is attracted to two unshared electrons of another molecule

Question 6

London Dispersion Forces

Answer 6

The dipole-dipole force resulting from the uneven distribution of electrons and the creation of temporary dipoles - When the electrons move toward one side of an atom or molecule that side becomes momentarily negative and the other side becomes momentarily positive

Question 7

Cl2 is?

Answer 7

Dispersion

Question 8

H2S is?

Answer 8

Dipole-Dipole

Question 9

What elements, when bonded with hydrogen, form a hydrogen-bond?

Answer 9

n - nitrogen, o - oxygen, f - fluorine

Question 10

NH3

Answer 10

hydrogen bond

Question 11

sublimation

Answer 11

direct change from solid to gas (occurs when the temperature is increased)

Question 12

deposition

Answer 12

a direct change from a gas to a solid (occurs when the temperature is decreased)

Question 13

triple point

Answer 13

indicates above a temp and pressure where water cannot exist as a liquid anymore

Question 14

intermolecular forces are/exist

Answer 14

between molecules

Question 15

viscous (idk if we need this or not but i saw it)

Answer 15

resistance of a fluid (liquid or gas) to a change in shape, or movement of neighboring portions relative to one another

Question 16

I2, Br2, Cl2

Answer 16

dispersion

Question 17

Explain the difference in enthalpy of vaporization and enthalpy of fusion of a substance.

Answer 17

Enthalpy of fusion is the energy added during melting or removed during freezing. Enthalpy of vaporization is the energy added during vaporization or removed during condensation.

Question 18

what decreases entropy (particles are less spread out)

Answer 18

condensation

Question 19

what is the point when a solid becomes a liquid?

Answer 19

melting

Question 20

when a solid is heated enough, it becomes a…

Answer 20

liquid

Question 21

what is the enthalpy of fusion

Answer 21

the energy required to melt 1 mol of a substance

Question 22

When do dispersion forces arise

Answer 22

when there is an uneven distribution of electrons

Question 23

which is the weakest among the intermolecular forces? (Hydrogen bond, Dipole-Dipole, London Dispersion Force)

Answer 23

London Dispersion Force

Question 24

difference between intermolecular and intramolecular

Answer 24

inter - multiple, intra - 1

Question 25

what affects the strength of the intermolecular force

Answer 25

the size and type of the atom

Question 26

Which state has the lowest entropy?

Answer 26

solid

Question 27

What is cohesion?

Answer 27

Attraction of liquid particles for each other

Question 28

What is adhesion?

Answer 28

The attraction of liquid particles to particles of solid surfaces

Question 29

Define intermolecular forces.

Answer 29

The attractive forces between molecules of covalent compounds

Question 30

what causes surface tension

Answer 30

cohesive forces between neighboring molecules in a liquid

Question 31

do entropy and enthalpy oppose or complement each other at state changes?