Is This the Correct Formula for the Reaction of SO2 with Humid Air?

[MarcMTL]

Homework Statement

Sulfur dioxide reacts with humid air to produce Sulfure trioxide. Find the chemical equilibirum.

Homework Equations

The Attempt at a Solution

I wrote out that:

SO₂ + O₂ + H₂O(g) --> SO₃ + H₂O(g)

And balanced, I obtain:

2 SO₂ + O₂ + 2 H₂O(g) --> 2 SO₃ + 2 H₂O(g)

Is this the correct formula for the reaction of SO₂ with humid air?
I seem to find that the H₂0 doesn't react at all, it is basically endups as H₂O at the end of the reaction.

Thanks for letting me know if I'm on the right track.

Marc

 

[Borek]

If water is present on both sides of the equation in identical quantities, it cancels out. If its presence is necessary for the reaction, it can be treated as a catalyst, so you should write H²O above the arrow.

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