Sulfur trioxide is formed by the catalytic oxidation of sulfur dioxide:

2SO2(g)+O2(g)→2SO3(g)
If ΔH∘= -197.8kJ/mol and ΔS∘= -188.0J/K , what is ΔStotal for this reaction?
Is the reaction spontaneous under standard-state conditions at 25 ∘C?

3 answers

dH surroundings = -dH/T
dStotal = dH surroundings + dH system (in the problem)
Awesome thank you!
How would I determine when the reaction goes nonspontaneous?
If dStotal is +, the reaction is spontaneous.
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