4.5 moles each of hydrogen and iodine is heated in a sealed 10 litre vessel. At equilibrium, 3 moles of HI were found. The equilibrium constant for is

Question

4.5 moles each of hydrogen and iodine is heated in a sealed 10 litre vessel. At equilibrium, 3 moles of HI were found. The equilibrium constant for  is

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Step 1 — ICE table:

| | H₂ | I₂ | HI |
|--|--|--|--|
| Initial | 4.5 | 4.5 | 0 |
| Change | −1.5 | −1.5 | +3 |
| Equil. | 3.0 | 3.0 | 3.0 |

Step 2 — Concentrations (V = 10 L):

Step 3 — Calculate :

Answer: 1

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