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AQA · GCSE · Chemistry · Higher

Energy transfer in reverse reactions

Q05.1 1 mark

Sulfuric acid is produced by an industrial process.

In the process, sulfur dioxide (SO₂) reacts with oxygen (O₂) to produce sulfur trioxide (SO₃). The equation for the reversible reaction is:

2 SO2(g)+O2(g)⇌2 SO3(g)2\,SO_2(g) + O_2(g) \rightleftharpoons 2\,SO_3(g)

The forward reaction releases 198 kJ/mol of energy.

What is the amount of energy transferred during the reverse reaction? Tick one box.

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  1. 1 Selects = 198 kJ/mol.
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