More than one reaction Consider the following two gas -phase reactions A+ B=C 2C=D 

a) What are the two equilibrium equations relating the two unknown extents of reaction and the initial gas -phase compositions? You can assume the pressure is low enough that the gases are ideal. 

b) What is the equilibrium gas -phase composition at 2.0 atm total pressure given initial gas -phase composition yA = yB = 0.5, yc= yD= 0, and K1 = 1.0, K2 = 2.5? Solve the two nonlinear equations numerically. If a computer is not available, you can use trial and error (partial answer: yA = 0.31). 

c) What is the equilibrium gas -phase composition at 2.0 atm total pressure given initial gas -phase composition yA = yc = 0.5, yB = YD = 0 (partial answer yA = 0.62)?