quiz/exam 3 prep Flashcards
Symmetrical stretching (CO2 & O2)
No change in center of positive and negative charge during vibration
In this vibrational state CO2 does not absorb IR
Anti-symmetrical stretching (CO2)
Change in center of positive and negative charge during this vibration
Bending or Wagging (CO2)
Change in center of positive and negative charge during this vibration
Symmetrical stretch (H2O)
Change in center of positive and negative charge during this vibration, dipole stretches
Ant-symmetrical stretch (H2O)
Change in center of positive and negative change during this vibration, dipole stretches, off center too.
Bending or wagging (H2O)
Change in center of positive and negative charge during this vibration, dipole stretches
Molecules that are not greenhouse gasses
Diatomic molecules with the same atoms cannot be greenhouse gasses ex. O2
Molecules that are greenhouse gasses
CO2, H2O, CH4
Symmetrical stretch
Anti-symmetrical stretch
Re-mineralization Photosynthesis
C sink
Plant biomass (CH2O)
Re-mineralization Detritus
C stored in organic rich sediments
Re-mineralization Microbial remineralization
C stored in organic rich sediment
Emittion of CO2 an CH4
The three remineralization processes
Aerobic
Methanogenisis
Sulfate reduction
Greenhouse gases released by remineralization
CO2 and CH4
Aerobic remineralization
CH2O+O2->H2O+CO2
CO2 is the greenhouse gas released by this remineralization process
Methanogenisis Remineralization
2CH2O->CH4+CO2
Slowest
CH4 is the greenhouse gas that is released
Sulfate Reduction Remineralization
2CH2O+SO4 2- -> 2HCO3+H2S
Out competes Methanogenisis
2HCO3 is the same thing as CO2 gas
Greenhouse gas released is CO2
Biochemical zoneation: Saltwater
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
Biochemical Zoneation: Fresh water
O2 is consumed as CH4 is produced
Alpha Decay
Atomic mass decreases by 4 and atomic number decreases by 2
Betta decay
Atomic number is increased by 1
Fate of light from sun to earth
Light 100% to atmosphere
Atmosphere loses 20%
Remaining 80% to Earth
Earth absorbs 50% (of 100% total)
Remaining 30% reflected
