Fuels and energy

Question 1

advantages and disadvantages of biodiesel

Answer 1

Ad: renewable, less harmful emissions
Dis: low supplies, conflicting environmental impacts eg deforestation

Question 1

advantages and disadvantages of biogas

Answer 1

Ad: renewable, productive use of waste
Dis: energy inefficiency

Question 2

advantages and disadvantages of coal

Answer 2

Ad: easily mined
Dis: non-renewable, pollution

Question 3

advantages and disadvantages of oil

Answer 3

Ad: ease of transportation
Dis: limited world supply

Question 4

adv and disadv of natural gas

Answer 4

Ad: high efficiency, moderate cost
Dis: non renewable

Question 5

petrodiesel structure

Answer 5

alkane

Question 6

petrol viscosity

Answer 6

lower than biodiesel

Question 7

biodiesel structure

Answer 7

esters from long chain fatty acids and methanol

Question 8

biodiesel viscosity

Answer 8

higher than petrol

Question 9

exothermic graph

Answer 9

higher to lower

Question 10

endothermic graph

Answer 10

lower to higher

Question 11

kj/mol to kj/g

Answer 11

divide by molar mass

Question 12

pv=nrt , units

Answer 12

p= kPa
t= K
V= L

Question 13

making biodiesel from triglycerides

Answer 13

transesterfication reaction

Question 14

conditions for transesterfication

Answer 14

catalyst, KOH

Question 15

triglyceride + methanol =

Answer 15

biodiesel + glycerole

Question 16

process making bioethanol with yeast

Answer 16

fermentation