Kp and calculating equilibrium constants Quiz
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5 questions, one answer each
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1. A gas has a mole fraction of 0.25 in a mixture at a total pressure of 4.0 atm. What is its partial pressure?
- A. 0.063 atm
- B. 16 atm
- C. 1.0 atm
- D. 0.25 atm
2. What is the unit of Kp for N₂O₄(g) ⇌ 2NO₂(g) with pressures in atm?
- A. atm
- B. atm²
- C. atm⁻¹
- D. no units
3. What is the unit of Kp for N₂(g) + 3H₂(g) ⇌ 2NH₃(g) with pressures in atm?
- A. atm²
- B. atm
- C. atm⁻¹
- D. atm⁻²
4. At equilibrium [H₂] = [I₂] = 0.10 mol dm⁻³ and [HI] = 0.50 mol dm⁻³ for H₂ + I₂ ⇌ 2HI. What is Kc?
- A. 0.040
- B. 25
- C. 0.50
- D. 0.020
5. In the heterogeneous equilibrium C(s) + CO₂(g) ⇌ 2CO(g), which species appears in the Kp expression?
- A. C, CO₂ and CO
- B. CO₂ and CO only
- C. CO only
- D. C and CO₂ only