Calculate the ΔG°_rxn using the following information. 2 H₂S(g) + 3 O₂(g) → 2 SO₂(g) + 2 H₂O(g) ΔG°_rxn= ?
ΔH°_f (kJ/mol) -20.6 -296.8 -241.8
S°(J/mol^∙K) 205.8 205.2 248.2 188.8

Question

Calculate the ΔG°_rxn using the following information. 2 H₂S(g)+ 3 O₂(g)→ 2 SO₂(g)+ 2 H₂O(g)ΔG°_rxn= ? ΔH°_f (kJ/mol)-20.6 -296.8 -241.8 S°(J/mol^∙K)205.8 205.2 248.2 188.8

Quizplus · Accepted Answer

The correct answer is A because the ΔG°_rxn can be calculated using the equation ΔG°_rxn = ΣΔG°_f(products) - ΣΔG°_f(reactants). Plugging in the values from the table, we get ΔG°_rxn = [2ΔG°_f(SO₂) + 2ΔG°_f(H₂O)] - [2ΔG°_f(H₂S) + 3ΔG°_f(O₂)] = [2(-241.8 kJ/mol) + 2(-228.6 kJ/mol)] - [2(-20.6 kJ/mol) + 3(0 kJ/mol)] = -990.3 kJ.

Calculate the ΔG°rxn Using the Following Information

Calculate the ΔG°_rxn Using the Following Information