. The anaerobic decomposition of organic matter (including wastes) produces a mixture of carbon dioxide and methane, e. g. C6H12O6  3 CO2 + 3 CH4. (a) Since CO2 has no fuel value, suggest an easy method for separating the two gaseous products of this reaction. (b) Imagine a landfill that contains both waste paper (which you can assume to be cellulose) and waste cooking oils or fats (which you can assume to be stearin). Both undergo anaerobic decomposition. Which of these two wastes would produce gas with the higher CH4/CO2 ratio, and by what factor?

Suppose a pair of chemical compounds a and b can react in two different ways: a + b -> c reaction 1 gives product c. a + b -> d reaction 2 gives product d. the following facts are known about the two reactions: . reaction 1 is endothermic and reaction 2 is exothermic. if a reaction vessel is charged (filled) with a and b , then at first d is produced faster than c. use these facts to sketch a qualitative reaction energy diagram for both reactions. note: because these sketches are only qualitative, the energies don? t have to be exact. they only have to have the right relationship to each other. for example, if one energy is less than another, that fact should be clear in your sketch.