Ms. Ciara Borer Jr.
Feb 15, 2025
Chemistry: List the equilibria from largest to smallest equilibrium constant.?
Ethene (C2H4) reacts with halogens (X2) according to the following reaction:
C2H4(g) + X2(g) ⇌ C2H4X2(g).
The concentrations at equilibrium for different halogens at the same temperature are represented in Figure 1, where X2 is Cl2 (green), Br2 (brown), and I2 (purple).
Could someone please explain how to determine the equilibrium constants for these reactions and rank them from largest to smallest? I would appreciate a step-by-step solution. Thank you!
1 Answers
Since Keq is calculated as
Keq = [C2H4X2]/[C2H4][X2]
Look at each "reaction". In the Cl2 one, you have 8 product molecules and 2 each of the two reactants. In the Br2, you have 6 product molecules and more reactants, and in the I2, you have 4 products. Since the amount of product is lower in each on, KCl2 > KBr2 > KI2
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