AP Chemistryeasymcq1 pt
At a certain temperature the equilibrium N₂O₄(g) ⇌ 2NO₂(g) holds P(N₂O₄) = 2.0 atm and P(NO₂) = 0.50 atm. What is Kp?
A.0.125
B.0.25
C.4.0
D.8.0
Explanation
Core Concept
For this dimerization Kp = P(NO₂)² ÷ P(N₂O₄). Squaring 0.50 atm because the coefficient is 2 gives 0.25. Dividing by 2.0 atm yields Kp = 0.125. Such small values fit this equilibrium, which favors colorless N₂O₄ at lower temperatures.
Correct Answer
A0.125
More Unit 7: Equilibrium practice questions
- mediumDoubling the volume of a gaseous equilibrium mixture does what?
- hardWhich of these salts is most soluble?
- easyFor the reaction A(g) + B(g) ⇌ C(g), an equilibrium mixture contains 0.20 M A, 0.10 M B, and 0.40 M C. What is Kc?
- easyHow does the equilibrium constant for a reaction change when a catalyst is added?
- hardA mixture initially contains 2.0 M A. For 2A ⇌ B with K = 0.10, what is [B] at equilibrium (approximately)?
Practice more AP Chemistry questions with full explanations
Practice Unit 7: Equilibrium Questions →