Question

ynthesis gas, a mixture that includes the fuels carbon monoxide and molecular hydrogen, is used produce liquid hydrocarbons and methanol. It is made at pressures up to 100 atm by oxidation of methane followed by the steam re-forming and water-gas shift reactions. Because the is exothermic, temperatures reach 950 1100°C, and the conditions are such that the amounts of hydrogen, carbon monoxide, carbon dioxide, methane and water leaving the reactor are close to the equilibrium amounts for the steam re-forming and water-gas shift reactions: process CH4 (g)+ H20 (g) CO (g) +3 H2 (g) CO (g) + H20 (g) CO2 (g)+ H2 () (steam re-forming) (water-gas shift) Answer the following questions. A) At 1071°C, what are ΔG° and ΔΗΡ for the steam re-forming reaction and for the water-gas shift reaction? B) By doubling the steam re-forming step and adding it to the water-gas shift step, we obtain the following combined reaction Is this reaction spontaneous at 1071 C in the standard state? of the starting materials have reacted)? 2 CHs (g)+3 H20 (g) CO2(g)+CO (g)+ 7 H2 (g) C) Is the combined reaction spontaneous at 947 atm and 49.1% conversion (ie., when 49.1% D) Is the combined reaction spontaneous at 94.7 atm and 91.4% conversion?

Answer 1

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