Water decomposes at 2300 K:

The percent of water decomposing at 2300 K and 1 bar is (Nearest integer). Equilibrium constant for the reaction is at 2300 K.

Question

Water decomposes at 2300 K:

The percent of water decomposing at 2300 K and 1 bar is  (Nearest integer). Equilibrium constant for the reaction is  at 2300 K.

Canvas Classes · Accepted Answer

🧠 Small- Dissociation — Approximate  to Get

The reaction is ,  at  K, total pressure  bar. Find the percent dissociation.

The visible clue:  is very small (), so very little water decomposes. That means  and we can safely approximate . The first move is to write  in terms of , apply the approximation, and solve for .

🗺️ Working It Out

ICE table for  mol initial , dissociation :

| Species |  |  |  | Total |
|---|---|---|---|---|
| Equil. |  |  |  |  |

Partial pressures with total  bar:

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