Open-Ended Exam 3

Question 1

What forces are the weakest?

Answer 1

London

Question 2

Higher the mass…

Answer 2

higher the melting point and boiling point

Question 3

Higher the branched chains…

Answer 3

Lower the melting point and boiling point

Question 4

Temperature

Answer 4

kinetic energy, motion of particles

Question 5

Internal energy

Answer 5

kinetic energy + potential energy

Question 6

Exothermic

Answer 6

release of heat

Question 7

Endothermic

Answer 7

Absorption of energy

Question 8

Heat capacity

Answer 8

the amount of heat required to change the temperature of a given amount of matter

Question 9

Increase in volume…

Answer 9

lower the pressure

Question 10

Volume and number of moles are/arent directly proportional?

Answer 10

are

Question 11

Pressure and # of moles are/arent directly proportional

Answer 11

are

Question 12

Pressure and volume are/arent directly proportional

Answer 12

arent

Question 13

Temp and volume are/arent directly proportional

Answer 13

are

Question 14

Volume and # of moles are/arent directly proportional

Answer 14

are

Question 15

Pressure and temp are/arent directly proportional

Answer 15

are

Question 16

Compressing the walls of a container will result volume to increase/decrease therefore the pressure will increase/decrease.

Answer 16

Decrease, increase

Question 17

When cooling down a gas in a rigid container its temperature will decrease and its pressure will increase/decrease

Answer 17

decrease

Question 18

After blowing air into a party balloon, the number of moles will increase, the volume will increase/decrease/ remain constant and that is because the pressure will increase/decrease/remain constant

Answer 18

increase, remain constant

Question 19

In a closed container we double the temp and double the volume the pressure will increase/decrease/remain constant

Answer 19

remain constant

Question 20

How do volume and temperature relate to each other? What happens to particles that makes the volume change as you increase temp? What variables must remain constant?

Answer 20

The volume increases as the temperature increases, and decreases as the temperature decreases. As you increase the temperature the particles move faster. Pressure remains constant.

Question 21

What is the composition of air?

Answer 21

Nitrogen-78% Oxygen-21% Argon-1%

Question 22

The higher the altitude…

Answer 22

the lower the atmospheric pressure, the lower the temp of the boiling point

Question 23

high IMF and mass, higher/lower the B.P, higher/lower Hvap, Higher/lower the vapor pressure

Answer 23

Higher, higher, lower

Question 24

Vapor Pressure

Answer 24

The pressure of a gas in equilibrium even when the liquid isn’t boiling.

Question 25

Alcohol, amides and amines have what bonds?

Answer 25

Hydrogen bonds

Question 26

Ether, aldehydes, ketones, carboxylic, ester have what bonds?

Answer 26

Dipole-Dipole

Question 27

Higher the M.P weaker/stronger the IMF

Answer 27

Stronger

Question 28

How many ‘things’ need to be attached to a carbon to make it an alpha carbon?

Answer 28

4

Question 29

Explain what structural factors make some peaks appear at a higher wavenumber than others.

Answer 29

The differences in wavenumbers are mainly due to different hybridization which = bond strength, the stronger the bond is.

Question 30

why does a gas have more potential energy than a liquid

Answer 30

potential energy of any matter depends upon inter molecular space and gases have highest inter molecular space

Question 31

sea level

Answer 31

760 torr

Question 32

why does ethanoic acid have a stronger boiling point than propanol

Answer 32

the higher boiling point of carboxylic acid as compared to alcohol is due to greater hydrogen bonding in acids than in alcohols.