THERE IS NO OTHER INFORMATION GIVEN BESIDES 298K
Exercise 19.87 The following reactions are important ones in catalytic converters in automobiles. Calculate ΔG∘for each at 298 K. Predict the effect of increasing temperature on the magnitude of ΔG∘. |
Part A 2CO(g)+2NO(g)→N2(g)+2CO2(g) Express your answer using four significant figures.
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SubmitMy AnswersGive Up Part C 5H2(g)+2NO(g)→2NH3(g)+2H2O(g) Express your answer using four significant figures.
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SubmitMy AnswersGive Up Part E 2H2(g)+2NO(g)→N2(g)+2H2O(g) Express your answer using four significant figures.
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SubmitMy AnswersGive Up Part G 2NH3(g)+2O2(g)→N2O(g)+3H2O(g) Express your answer using four significant figures.
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Part A : 2CO(g)+2NO(g)→N2(g)+2CO2(g) : ΔG^{o}_{rxn} = ?
ΔG^{o}_{rxn} = ΔG^{0}_{f}_{products} – ΔG^{0}_{f}_{reactants}
ΔG^{o}_{rxn} = [(ΔG^{0}_{f}_{N2(g)} )+ (2 x ΔG^{0}_{f}_{CO2 (g)} )]- [( 2 x ΔG^{0}_{f}_{CO(g)} )+ (2 x ΔG^{0}_{f}_{NO (g)} )]
= [(0)+(2x(-394.4))] - [(2x(-137.3))+ (2x(86.6))] kJ/mol
= -687.4 kJ
Part B : Since ΔG^{o}_{rxn} is negative upon increase in temperature ΔG^{o}_{rxn} also increases
Part C : 5H2(g)+2NO(g)→2NH3(g)+2H2O(g) : ΔG^{o}_{rxn} = ?
ΔG^{o}_{rxn} = ΔG^{0}_{f} _{products} – ΔG^{0}_{f} _{reactants}
ΔG^{o}_{rxn} = [(2xΔG^{0}_{f} _{NH3(g)} )+ (2 x ΔG^{0}_{f} _{H2O (g)} )]- [( 5x ΔG^{0}_{f}_{H2(g)} )+ (2 x ΔG^{0}_{f} _{NO (g)} )]
= [(2x(-16.5))+(2x(-228.6))] - [(5x0)+ (2x(86.6))] kJ/mol
= -663.4 kJ
Part D : Since ΔG^{o}_{rxn} is negative upon increase in temperature ΔG^{o}_{rxn} also increases
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