The following pair of reactions is carried out in a closed system, until equilibrium is attained: 

(R1): 2NO2 (g) ↔2NO (g) 1O2 (g) (R2): 2NOsgd↔N2 (g) 1O2 (g) 

The reactor initially contains 10 moles of NO₂ . 

A. For a constant reaction pressure of 1 bar, plot the final number of moles of each of the four compounds as a function of temperature over the range 300 to 1000 K. Use the virial equation of state, and assume the system is an ideal mixture of real gases. Assume ΔC_P = 0. 

B. Repeat part A for pressures of 2, 5, 10, and 25 bar.