Calculate the standard free energy of the following reactions at 25°C, using standard free energies of formation.
Use the References to access important values if needed for this question.
(a) C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(l)
ΔG° = _____kJ
(b) 2HBr(g) → H2(g) + Br2(g)
ΔG° = _____kJ
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