Use the Delta H degree_f and Delta H degree_rxn information provided to calculate Delta H degree_f...

Question

Question

Answer 1

Answer #1

Hf = formation

Hrxn = HfSO3 - (HfSO2 + HfO2)

HfO2 = 0, by definition

then

Hrxn = -198

-198 = HfSO3 - (HfSO2 )

-198 = HfSO3 - -297

HfSO3 = -198-297 = -495 kJ/mol

which is answer c

Answer 2

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