Taavi Ragul AT109 Sissejuhatus Nafta on looduslik maavara. Ta on peamiselt vedelate süsivesinike segu. Koostis Nafta koosneb: 1) Süsinikust - 82-87% 2) Vesinikust 12-15% 3) Väävlist 1,5% 4) Lämmastikust 0,5% 5) Hapnikust 0,5% Ühendid Nafta koosneb peamiselt 3-st ühendist: 1) Nafteenidest 2) Parafiinidest 3) Aromaatsetest ühenditest Nafteenid Nafteenide valem on: CnH2n Nafteenid on oluliselt raskemad ja ka keerukama struktuuriga kui parafiinid. Nafteenide hulka kuulub asfalt. Parafiinid Parafiinide e alkeenide valem : CnH2n+2 Parafiinid on nafta peamiseks koostisosaks Nende keemistemperatuur on 40-200°C Aromaatsed ühendid Aromaatsete ühendite valem on : CnH2n-6 Aromaatsed ühendid moodustavad nagfta koostisest väikese osa Aromaatsete ühendite hulka kuulub nt benseen. Nafta omadused Nafta on väga tuleohtlik. Nafta erikaal on väiksem vee omast. Nafta on ma...
A: Hello! B:Hello you too! A:You are living in USA? B: Yes, and you? A: I live in Great Britain! B:This is your car? A: Yes, why you asking that? B: Your car windshield is broken! A: You mean windscreen? B: Yes windscreen, like british says! A:Thank you to told me that, i need to go now in the car parts shop! B: I think you need to take a cab to go there! A: Yes, because my car is out of petrol! B: In america, we say gas or gasoline, not petrol. A:Yes, but we are in Britain! B: Fall is coming, outside temperature gets colder now! A:It gets colder here yes, we say autumn. B:Lets go to take a coffe and cookie in restaurant, so close your automobile trunk and hood, lets get move. A: Ok, its nice saloon, isnt it? B:Yes you mean sedan, and put your undershirt back on! A:I need to put some post in post box before we can go to restaurant. B: Hurry up! I pay check tonight and we can go to watch movie too. A: Ok, its good film isn,t it? I take m...
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