Sulfur dioxide reacts with oxygen to form?

The Reaction of Oxygen with Sulfur Dioxide to make Sulfur Trioxide.

Sulfur dioxide is made by reacting sulfur with oxygen.

Sulfur dioxide can be made to react with more oxygen
to make sulfur trioxide.
This is another example of oxidation.

The reaction is reversible (shown by the  arrow).
The forward reaction (from left to right) is exothermic.

This is the balanced chemical equation for the reaction of
sulfur dioxide with oxygen.

sulfur dioxide  +  oxygen    sulfur trioxide.
2SO2(g)        +    O2(g)             2SO3(g)

The industrial conditions for the chemical reaction are
1) The Temperature is 450 °C.
2) The Pressure is between 1 and 2 atmospheres.
3) A Vanadium(V) oxide (V2O5) catalyst is used.

About 99% of the sulfur dioxide
is converted into sulfur trioxide under these conditions.
The sulfur trioxide is used to make sulfuric acid.
The effect on the rate of the reaction and
the yield which you get from a reversible reaction
depends on the conditions (temperature, pressure and catalyst).
These have been summarized for the Haber Process.1. Increasing the temperature favours the endothermic reaction.2. Increasing the pressure favours the smaller volume.3. Using a catalyst gives the equilibrium conditions more quickly.Hope that helps :)

Hi there

2SO2 + O2 > 2SO3 

Makes Sulfur trioxide

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.

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