2659115
Description
Flashcards by Alan Stone, updated more than 1 year ago
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Created by Alan Stone
almost 9 years ago
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| Question | Answer |
| POWER STATIONS | -BURN HUGE AMOUNTS OF FOSSIL FUELS TO MAKE ELECTRICITY |
| CARS | THESE ALSO BURN A LOT OF FOSSIL FUELS |
| FUELS LIKE CRUDE OIL AND COAL | CONTAIN CARBON AND HYDROGEN. DURING COMBUSTION THE CARBON AND HYDROGEN ARE OXIDISED SO THAT CARBON DIOXIDE AND WATER VAPOUR ARE RELEASED INTO THE ATMOSPHERE. HEAT IS ALSO PRODUCED |
| COMBUSTION | HYDROCARBON + OXYGEN = CARBON DIOXIDE + WATER VAPOUR |
| SULFUR | IF THE FUEL CONTAINS SULFUR IMPURITIES, THE SULFUR WILL BE RELEASED AS SULFUR DIOXIDE WHEN IT IS BURNT |
| OXIDES OF NITROGEN | THESE WILL BE FORMED IF THE FUEL IS BURNT AT HIGH TEMPERATURE |
| COMPLETE COMBUSTION | WHEN THERE'S PLENTY OF OXYGEN, ALL THE FUEL BURNS |
| PARTIAL COMBUSTION | IF THERE'S NOT ENOUGH OXYGEN, SOME OF THE FUEL DOESN'T BURN. |
| PROBLEMS OF PARTIAL COMBUSTION | SOLID PARTICLES (PARTICULATES) OF SOOT (CARBON) AND UNBURNT FUEL ARE RELEASED. CARBON MONOXIDE (A POISONOUS GAS) IS ALSO RELEASED |
| ACID RAIN | CAUSED BY SULFUR DIOXIDE |
| HOW IS ACID RAIN FORMED? | SULFUR DIOXIDE MIXES WITH CLOUDS TO FORM DILUTE SULFURIC ACID. THIS FALLS AS ACID RAIN |
| OTHER CAUSES OF ACID RAIN | OXIDES OF NITROGEN (YES, THEM AGAIN!) CAUSE ACID RAIN BY FORMING DILUTE NITRIC ACID IN CLOUDS |
| PROBLEMS OF ACID RAIN | CAUSES LAKES TO BECOME ACIDIC, KILLING MANY PLANTS AND ANIMALS. KILLS TREES AND DAMAGES LIMESTONE BUILDINGS AND STONE STATUES MAY IMPACT ON HUMAN HEALTH |
| ENVIRONMENTAL IMPACT OF ELECTRICITY | MUST BE BALANCED AGAINST BENEFITS. GOVERNMENTS RECOGNISE THIS AND HAVE DRAWN UP INTERNATIONAL AGREEMENTS TO REDUCE EMISSIONS OF AIR POLLUTANTS |
| HOW CAN WE REDUCE ACID RAIN? | BY REDUCING SULFUR EMISSIONS, OF COURSE! |
| REDUCING ACID RAIN-THE FACTS | MOST SULFUR CAN BE REMOVED FROM FUELS BEFORE BURNING BUT IT COSTS MORE MONEY. IT ALSO TAKES MORE ENERGY, WHICH COMES FROM BURNING MORE FUEL WHICH RELEASES THE GREENHOUSE GAS CARBON DIOXIDE! |
| REDUCING ACID RAIN-THE FACTS (PART 2) | PETROL AND DIESEL ARE NOW BEING REPLACED BY LOW SULFUR VERSIONS POWER STATIONS HAVE ACID GAS SCRUBBERS TO TAKE HARMFUL GASES OUT BEFORE THEY ARE RELEASED WE COULD ALWAYS USE LESS FOSSIL FUELS! |
| WHAT CAN YOU DO? | SULFUR DIOXIDE CAN BE CARRIED A LONG WAY IN THE ATMOSPHERE, CAUSING PROBLEMS IN ANOTHER COUNTRY. SO, TRY PUTTING ON AN EXTRA JUMPER INSTEAD OF TURNING UP THE HEATING AND WALK TO COLLEGE INSTEAD OF GETTING A LIFT BY CAR! |
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