At ambient conditions, nitrogen dioxide and dinitrogen tetraoxide form a vapor phase equilibrium mixture with each other: 

2NO₂ (g) ↔ N₂ O₄ (g)

A. 10 moles of nitrogen dioxide are placed in a reactor that is maintained at T = 25°C and P 5 1 bar. Find the equilibrium composition of the vapor phase. 

B. 10 moles of nitrogen dioxide and 50 moles of water are placed in a reactor that is maintained at T = 25°C and P = 1 bar. Find the equilibrium compositions of the liquid and vapor phases.  

Assume that no chemical reaction occurs in the liquid phase. The Henry’s Law constants at this temperature are 4695 bar for NO₂ in water and 40 bar for N₂O₄ in water (Shwartz, 1981).