Question

Choose the correct answer for the reaction, 

N₂ (g) + 3H₂ (g) ⇌ 2NH₃ (g); ∆_r H = -91.8 kJ mol^-1 The concentration of H (g) at equilibrium can be increased by 

(1) Lowering the temperature 

(2) Increase the volume of the system. 

(3) Adding N at constant volume.

(4) Adding H at constant volume.

Answer 1

(2) and (4) are correct.