The activity of carbon in liquid iron-carbon alloys is determined by equilibration of CO/CO2 gas mixtures with the melt. Experimentally at PT = 1 atm, and 1560C (1833 K) the equilibrated gas composition as a function of carbon mole fraction (NC) (valid up to carbon saturation) is: log 10 (Pass) = legro NC - 2.43 (1-NC1 +6.45 Poz For the equilibrium C(s) + CO2(g) = 2CO(g) Krxn, 1833 = 17,000 (a) Derive an equation for log10(ac) as a function of NC, (b) Calculate YC at NC = 0 ( The Henry's Law constant, 1c) (Hint: 0.4