Given the data in the table below, ΔH°rxn for the reaction 2SO2 (g) + O2 (g) → 2SO3 (g)
Is __________ kJ. 
A) -99
B) 99
C) -198
D) 198
E) The ΔH°f of O2 (g) is needed for the calculation.
Correct Answer:
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