The equilibrium constant for decomposition of

( kJ mol) is

at 2300 K and total pressure at equilibrium is 1 bar. Under this condition, the degree of dissociation () of water is (nearest integer

Question

The equilibrium constant for decomposition of

( kJ mol) is

at 2300 K and total pressure at equilibrium is 1 bar. Under this condition, the degree of dissociation () of water is   (nearest integer value).

[Assume  is negligible with respect to 1]

Canvas Classes · Accepted Answer

Step 1: Set up ICE table

| |  |  |  |
|---|---|---|---|
| Initial | 1 | 0 | 0 |
| Equil. |  |  |  |

Total moles at equilibrium:  (since )

Step 2: Express partial pressures (P = 1 bar)

Step 3: Write  expression

Since  bar:

Step 4: Solve for

Answer: 5 (i.e., )

Key Points to Remember:
- For :  when 
- Degree of dissociation  is dimensionless (fraction, not percentage)
-

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