Examine the equation of a reversible reaction.

2so2 + o2 ⇌ 2so3

which of the answer choices correctly lists the reverse reaction?

2so2 + 2so3 → o2

2so3 + 2so2 → o2

2so3 + o2 → 2so2

2so2 + o2 → 2so3

2SO3 -> 2SO2 + O2 (not shown in the options)

Explanation:

In a reversible reaction, reactants react to produce products and products react to produce reactants, simultaneously.

Given the reversible reaction:

2SO2 + O2 ⇌ 2SO3

It has a forward reaction:

2SO2 + O2 -> 2SO3

and a reverse reaction:

2SO2 + O2 <- 2SO3

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