Suggested Solutions - DONE

[Pandemonium]

c) In the converter, heated gas is recycled between runs through catalyst beds, hence reducing heating (energy) costs

Hmm, perhaps this was not as far off the mark as I thought...

"To conserve energy, the mixture is heated by exhaust gases from the catalytic converter by heat exchangers."
[ http://en.wikipedia.org/wiki/Contact_process ]

And well, in this following image these heat exchangers seem to facilitate my 'runs through catalyst beds'
[ http://media-2.web.britannica.com/eb-media/59/7359-004-224E8A41.gif ]

Not an identical response but it makes me feel a whole lot better, I thought I had totally stuffed that one by conflating considerations for the exothermic reaction with the double absorption process

*edit* regarding, 5)a) circling O2 and (?) FeS2
"During WWII...The sulfur [from iron sulfide] was used in the production of sulfuric acid, an important chemical for industrial purposes. Now most sulfur production comes from H2S gas recovered from natural gas wells."
[ http://mineral.galleries.com/minerals/sulfides/pyrite/pyrite.htm ]

A bit out of date, VCAA; I thought the whole coursework was engineered towards rendering students as MODERN chemists Maybe there were testing us on our knowledge of the chronology of the industrial chemical age...

Did you circle those two hydrocarbons as well?
Cause they produce water and heat. LAwlLALWLWlaLASWlalWLAwll you could circle anything as long as you made a justification.

[Synesthetic]

c) In the converter, heated gas is recycled between runs through catalyst beds, hence reducing heating (energy) costs

Hmm, perhaps this was not as far off the mark as I thought...

"To conserve energy, the mixture is heated by exhaust gases from the catalytic converter by heat exchangers."
[ http://en.wikipedia.org/wiki/Contact_process ]

And well, in this following image these heat exchangers seem to facilitate my 'runs through catalyst beds'
[ http://media-2.web.britannica.com/eb-media/59/7359-004-224E8A41.gif ]

Not an identical response but it makes me feel a whole lot better, I thought I had totally stuffed that one by conflating considerations for the exothermic reaction with the double absorption process

*edit* regarding, 5)a) circling O2 and (?) FeS2
"During WWII...The sulfur [from iron sulfide] was used in the production of sulfuric acid, an important chemical for industrial purposes. Now most sulfur production comes from H2S gas recovered from natural gas wells."
[ http://mineral.galleries.com/minerals/sulfides/pyrite/pyrite.htm ]

A bit out of date, VCAA; I thought the whole coursework was engineered towards rendering students as MODERN chemists Maybe there were testing us on our knowledge of the chronology of the industrial chemical age...

Did you circle those two hydrocarbons as well?
Cause they produce water and heat. LAwlLALWLWlaLASWlalWLAwll you could circle anything as long as you made a justification.

Question 5)a) required you to circle the 'raw materials' without any mode of reasoning

And in any case my justification is that deriving S from FeS2 is a half-century old technique as according to that extract!