Chemistry

Given the thermochemical equation 2SO2 + O2 → 2SO3, ΔH°rxn = -198 kJ/mol, what is the standard enthalpy change for the decomposition of one mole of SO3?

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  1. You want 1 mol SO3 and not 2 so divide by 2. You want the reverse so change the sign.

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  2. 99 kJ/mol

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