Air and the Atmosphere

Air and the Atmosphere Content Composition of Air Air Pollution Composition of Dry Air Nitrogen Oxygen Other gas Other gases include Argon (0.03% and Carbon Dioxide (0.03%

Catalytic Converter - Made up of Rhodium, Platinum, Palladium List of reactions 1 𝐶𝑂 + 𝑁𝑂 → 𝑁2 + 𝐶𝑂2 2 𝐶𝑂 + 𝑂2 → 2𝐶𝑂2 3 2𝑁𝑂2 → 𝑁2 + 𝑂2 4 𝐶𝑋𝐻4𝑋 + 2𝑥𝑂2 → 𝐶𝑂2 + 2𝑥𝐻2𝑂 Flue Gas Desulfurization - Waste gases from combustion of fossil fuels are called flue gases - Desulfurization is the process of removing sulfur dioxide from flue gases - SO2 + CaCO3 → CaSO3 + CO2 - 2CaSO3 + O2 → 2CaSO4 - SO2 + CaO → CaSO3 Depletion of the ozone layer - Caused by chlorofluorocarbons in aerosols and refrigeration coolants - In UV rays, CFCS decompose to form chlorine atoms - React with ozone to form chlorine monoxide and oxygen - Ozone layer is destroyed and UV rays can reach earth Carbon Cycle Respiration → C6H12O6 + 6O2 → 6CO2 + 6H2O Photosynthesis → 6CO2 + 6H2O → C6H12O6 + 6O2 Greenhouse effect - Increased concentrations of greenhouse gases due to anthropogenic activities o Enhanced greenhouse effect → rise in temperature - Consequences? - More drought, flooding - Less snow + ice - More extreme weather incidents - RISING SEA LEVEL - Warmer oceans + partially melted glaciers + other ice → increase sea level. Ocean water expands when warm → further rise in sea level