Question

When N₂O₅ is heated at certain temperature, it dissociates as N₂O₅(g) rightleftharpoons N₂O₃(g) + O₂(g); K₁=2.5 At the same time N₂O₃(g) rightleftharpoons N₂O(g) + O₂(g) If initially 4.0 moles of N₂O₅ are taken in a 1.0L flask and equilibrium concentration of O₂ is 2.5M, equilibrium concentration of N₂O₅ is:

• A. \(1.0\,\text{M}\)
• B. \(1.5\,\text{M}\)
• C. \(2.166\,\text{M}\)
• D. 1.846M

Hint:

Multiple equilibria must be solved simultaneously.

Answer 1

The Correct Option is D

Step 1: Let equilibrium concentration of N₂O₅ = x.
Step 2: Using equilibrium relations and given [O₂]=2.5M, solve for x.
Step 3: x = 1.846M