quiz/exam 3 prep

Question 1

Symmetrical stretching (CO2 & O2)

Answer 1

No change in center of positive and negative charge during vibration

In this vibrational state CO2 does not absorb IR

Question 2

Anti-symmetrical stretching (CO2)

Answer 2

Change in center of positive and negative charge during this vibration

Question 3

Bending or Wagging (CO2)

Answer 3

Change in center of positive and negative charge during this vibration

Question 4

Symmetrical stretch (H2O)

Answer 4

Change in center of positive and negative charge during this vibration, dipole stretches

Question 5

Ant-symmetrical stretch (H2O)

Answer 5

Change in center of positive and negative change during this vibration, dipole stretches, off center too.

Question 6

Bending or wagging (H2O)

Answer 6

Change in center of positive and negative charge during this vibration, dipole stretches

Question 7

Molecules that are not greenhouse gasses

Answer 7

Diatomic molecules with the same atoms cannot be greenhouse gasses ex. O2

Question 8

Molecules that are greenhouse gasses

Answer 8

CO2, H2O, CH4

Question 9

Answer 9

Symmetrical stretch

Question 10

Answer 10

Anti-symmetrical stretch

Question 11

Re-mineralization Photosynthesis

Answer 11

C sink

Plant biomass (CH2O)

Question 12

Re-mineralization Detritus

Answer 12

C stored in organic rich sediments

Question 13

Re-mineralization Microbial remineralization

Answer 13

C stored in organic rich sediment

Emittion of CO2 an CH4

Question 14

The three remineralization processes

Answer 14

Aerobic
Methanogenisis
Sulfate reduction

Question 15

Greenhouse gases released by remineralization

Answer 15

CO2 and CH4

Question 16

Aerobic remineralization

Answer 16

CH2O+O2->H2O+CO2

CO2 is the greenhouse gas released by this remineralization process

Question 17

Methanogenisis Remineralization

Answer 17

2CH2O->CH4+CO2

Slowest

CH4 is the greenhouse gas that is released

Question 18

Sulfate Reduction Remineralization

Answer 18

2CH2O+SO4 2- -> 2HCO3+H2S

Out competes Methanogenisis

2HCO3 is the same thing as CO2 gas

Greenhouse gas released is CO2

Question 19

Biochemical zoneation: Saltwater

Answer 19

O2 is consumed till there is no more O2

Once there is no more O2 SO4 -2 begins to get reduced

When SO4 -2 is reduced to a certain point CH4 begins to be produced

Question 20

Biochemical Zoneation: Fresh water

Answer 20

O2 is consumed as CH4 is produced

Question 21

Alpha Decay

Answer 21

Atomic mass decreases by 4 and atomic number decreases by 2

Question 22

Betta decay

Answer 22

Atomic number is increased by 1

Question 23

Fate of light from sun to earth

Answer 23

Light 100% to atmosphere
Atmosphere loses 20%
Remaining 80% to Earth
Earth absorbs 50% (of 100% total)
Remaining 30% reflected