Chem2 Flashcards
4 major components of dry air
nitrogen, oxygen, argon, carbon dioxide
nitrogen fixation done by
lightning. N2+O2–>2NO. then reacts further with oxygen and water to form nitrous and nitric acids
thermosphere
ionosphere. warms with altiutude because of ions from sun. auroras
warming in stratosphere
uv radiation from sun triggers exothermic reactions. more UV is closer to sun so increaseds with altitude.
low pressure at?
high altitudes
how do barometers work
mercury pumped easier at high pressure. cant pump in alps (galileo and torricelli)
Why does the egg go into the bottle?
Pressure outside was greater than pressure inside. outside greater due to production of more gas
thermosphere charged particles
e+O
p+N2 charges those and gives off light as they go back to regular forms (down in energy level).
space shuttle glow
O+NO—> NO2* excited, goes back to regular form, gives off orange tail
chapman cycle
creation and destruction of ozone. no net change in concentration O2+UV-->2O O2+O-->O3 O3+UV---> O2+O O3+O-->2O2
ozone thickness
only 3mm thick. stretches about 30 miles though.starts at 20-30km. not pure ozone. Just in a high concentration
UV A
lest energy, longest wavelength, least damaging, greatest amount reaching earth
UV B
more damaging, most absorbed by ozone in atmosphere. 200-300nm. 97-99 blocked%
UV C
most energy, shortest wavelength, most damaging. totally absorbed by oxygen/ozone. No makes it to the service
UV radiation biological effect
damages DNA. UVB. increase in melanoma.
