Be sure to answer all parts Methanol a major industrial feed

Be sure to answer all parts. Methanol, a major industrial feedstock, is made by several catalyzed reactions, such as the equation below: CO(g) + 2H2(g) CH3OH() One concern about using CH3OH as an automobile fuel is its oxidation in air to yield formaldehyde, CH20(g), which poses a health hazard. Calculate AG° at 140.°C for this oxidation. kJ/mol

Solution

CO(g) + 2H2(g) ---> CH3OH(l)

DH0rxn = (-238.81) - (-110.53+2*0)

       = -128.28 kj

DSrxn = (126.8) - (197.6+2*130.57)

      = -331.94 j/mol.k

DG0 = DH0-TDS0

T = 140+273.15 = 413.15 k

DG0 = (-128.28)-(413.15*-331.94*10^-3)

      = 8.86 kj/mol