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MASS SPECTRA/4
Question | Answer |
---|---|
OXIDES OF NITROGEN AND GREENHOUSE GASES, NITRIC OXIDE NO, IS PRODUCED BY... | LIGHTENING AND SOIL BACTERIA. THE MAIN ANTHROPOGENIC SOURCES OF AND COMBUSTION OF FUEL IN CARS/AEROPLANE ENGINES. |
AT HIGH TEMPS OXYGEN AND NITROGEN REACT TO ... | PRODUCE à N2 + O2 à 2NO |
MOST NO IS REMOVED FROM CARS BY.... | CATALYTIC CONVERTS |
IN JET ENGINE NO... | RELEASED INTO THE ATMOSPHERE. CFCS AND HCFCA ARE POTENT GREENHOUSE GASES. ONLY PRODUCED ANTHROPOGENICALLY, |
A IS SULPHUR HEXAFLUORIDE WHICH IS USED IN | MANUFACTURE OF MAGNESIUM. |
ALTHOUGH CFCS NO LONGER PRODUCED SOME STILL IN.... | THE UPPER ATMOSPHERE BRUH. |
HCFCS ARE PRODUCED AS .... | REFRIGERANTS AND CAN ESCAPE. |
CO2 FORM FOSSIL FUELS COMBUSTION HAS ... | HIGHEST PROPORTIONS OF GREENHOUSE GASSES EMISSIONS. |
WHEN REFERING TO GREENHOUSE GAS YOU HAVE TO CONSIDER THE... | EFFECTIVENESS IN ABSORBING INFRARED RADIATION AND THE TIME THE GAS SPENDS IN THE ATMOSPHERE BEFORE BEING REACTED OR DEPOSITED ON THE EARTH’S SURFACE. |
METHANE ABSORBS MORE RADIATION PER MOLE THAN... | C02. |
OXIDES OF NITROGEN AND HCFCS ARE MORE... | POWERFUL ABSORBERS. |
GLOBAL WARMING POTENTIAL (GWP)... | OF EACH GAS. |
(GWP) IS BASED ON THE ABILITY.... | THE GAS HAS TO ABSORBED INFRARED AND THE EXTENT TO WHICH IT CAN BE REMOVED. |
C02 IS USED AS STANDARD AND GIVEN GWP RATING... | OF 1. |
GWP OF METHANE... | = 20, NO = 300. |
IF THE GLOBAL WARMING POTENTIAL AND CONCENTRATIONS OF GASES ARE KNOWN.... | THE EFFECT OF THE ENVIRONMENT CAN BE CALCULATED. |
THE TOTAL C02 EMISSIONS ACCOUNT FOR WHAT %... | 84% OF THE GREENHOUSE GAS EMMMISIONS, BUT THE EFFECT OF C02 IS ONLY 50% COZ OF THE LOWER GWP. |
WATER VAPOUR ACCOUNTS TO WHAT %... | 95% OF THE TOTAL GREENHOUSE EFFECT. |
ONLY 3% OF THE C02 IN THE ATM IS ... | OF ANTHROPOGENIC ORIGIN. CO2 CONTRIBUTES JUST 0.1% TO THE TOTAL GREENHOUSE EFFECT. |
CONTRIBUTION OF GREENHOUSE AFFECT (%) ... | WATER VAPOUR: 94.6 ,CO2 – 3.8, METHANE=1.1,NO =0.5 , OTHERS <0.1. |
INFRARED SPECTROSCOPY IS THE... | MEASURE THE AMOUNTS OF RADIATION ABSORBED , THOSE THIS BY SPLITTING THE INCIDENT BEAM INTO 2.ONE BEAM PASSED THROUGH A CELL CONTAIN A REFERENCE SAMPLE (USUALLY SOLVENT) AND |
THEN GOES TO THE DETECTOR; | |
IN INFRARED SPEC THE OTHER GOES ... | THROUGH THE DISSOLVED SAMPLE TO THE DETECTOR. THE DIFF BETWEEN THE 2 AMOUNTS OF RADIATION ARRIVING AT THE DETECTOR IS THE AMOUNT ABSORBED BY THE CHEMICAL. |
THE ANGLE OF DIFFRACTION GRATING IS SLOWLY ALTERED IN INFRED SPEC WHY.... | SO THAT THE DIFF FREQUENCIES SWEEP THROUGH THE APPARATUS. |
INFRED SPEC PROCESS... | 1ST IS THE IR SOURCE à SLITS à SAMPLE àSOLVENT àDIFFRACTION GRATING à DETECTORà COMPUTER. |
DIFFERENT BONDS IN A COVALENT MOLECULE ABSORBS RADIATION OF.... | DIFF FREQUENCIES, WHICH ARE MEASURED IN WAVE NUMBERS (FOR CHEMISTRY) (NM FOR PHYSICS). |