Engineering Board Exam Reviewer · Chemistry · hard

At equilibrium for N2 + 3 H2 2 NH3, the concentrations are [ N2] = 0.2 M, [ H2] = 0.6 M and [ NH3] = 0.4 M. What is Kc?

  1. 3.33
  2. 3.70
  3. 0.270
  4. 0.44

Answer

B. 3.70

Solution

Kc = [ NH3]2/([ N2][ H2]3) = 0.16/(0.2 × 0.216) = 3.70.

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