Chemistry · Equilibrium involving chemical processes: Law of chemical equilibrium, equilibrium constants (Kp and Kc) and their significance, the significance of Delta G and Delta G° in chemical equilibrium
of nitrogen and of hydrogen gas are heated in a closed vessel. At equilibrium, 3
\( 56 \mathrm{g} \) of nitrogen and \( 8 \mathrm{g} \) of hydrogen gas are heated in a closed vessel. At equilibrium, 34 g of ammonia are present. The equilibrium number of moles of nitrogen, hydrogen and ammonia are respectively:
- A. 1,2,2
- B. 2, 2, 1
- C. 1,1,2
- D. 2, 1, 2
Step-by-step solution
Initial moles: N2 = 56/28 = 2, H2 = 8/2 = 4. At equilibrium, NH3 = 34/17 = 2 moles. From N2 + 3H2 ⇌ 2NH3, let x = moles N2 reacted. Then NH3 produced = 2x = 2 → x = 1. Equilibrium moles: N2 = 2-1 = 1, H2 = 4-3(1) = 1, NH3 = 2.
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