Consider the generic reversible CVD reaction Ag --> B_s + C_g (T₂ > T₁ )

at 1 atm pressure (P_A + P_c = 1), where the free energy of the reaction is G = H - TS, Through consideration of the equilibria at T₁ and T₂:

(a) Derive an expression for P_A = P(T₁) P_A(T₂) as a function of T, H, and S₀.

(b) Plot P_A as a function of H.

(c) Comment on the gas transport direction and magnitude as a function of the sign and value of H.

Please explain clearly for thumbs up!