試題詳解

77. Nitrogen gas (N₂) reacts with hydrogen gas (H₂) to form ammonia (NH₃). At 200°C in a closed container, 1.0 atm of nitrogen gas is mixed with 2.0 atm of hydrogen gas. At equilibrium, the total pressure is 2.0 atm. Calculate the partial pressure of hydrogen gas at equilibrium.
(A) 2.0 atm
(B) 0.50 atm
(C) 1.5 atm
(D) 0.0 atm
(E) none of these