Problem: Calculate ΔS˚rxn for each of the reactions given below.3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

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Balanced reaction:    3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

S° NO2(g) = 240.1 J/mol•K

S° H2O(l) = 70.0 J/mol•K

S° HNO3(aq) = 146.4 J/mol•K

S° NO(g) = 210.8 J/mol•K

ΔS°rxn=S°f, prod-S°f, react

Note that we need to multiply each S˚ by the stoichiometric coefficient since S° is in J/mol • K.

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Problem Details

Calculate ΔS˚rxn for each of the reactions given below.

3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

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