A chemical engineer is studying the two reactions shown in the table below. In each case, she fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 26.0 °C and constant total pressure. Then, she measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of her measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. ΔΗ-2220. kJ J AS = 7479. K ? AG = 3co,(8) + 4H,0(1) - C,H,(s) + 50,(s) Which is spontaneous? O this reaction O the reverse reaction O neither ΔΗ-852. k J AS = Al,0,() + 2Fe(s) 2Al(s) + Fe,0,(s) AG = 0. kJ Which is spontaneous? O this reaction O the reverse reaction O neither
A chemical engineer is studying the two reactions shown in the table below. In each case, she fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 26.0 °C and constant total pressure. Then, she measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of her measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous because the system is at equilibrium. ΔΗ-2220. kJ J AS = 7479. K ? AG = 3co,(8) + 4H,0(1) - C,H,(s) + 50,(s) Which is spontaneous? O this reaction O the reverse reaction O neither ΔΗ-852. k J AS = Al,0,() + 2Fe(s) 2Al(s) + Fe,0,(s) AG = 0. kJ Which is spontaneous? O this reaction O the reverse reaction O neither
Chemistry: The Molecular Science
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Publisher:John W. Moore, Conrad L. Stanitski
Chapter16: Thermodynamics: Directionality Of Chemical Reactions
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Transcribed Image Text:A chemical engineer is studying the two reactions shown in the table below.
In each case, she fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 26.0 °C and constant total
pressure. Then, she measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction
free energy AG of the second reaction. The results of her measurements are shown in the table.
Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide
whether, under the conditions the engineer has set up, the reaction is spontaneous, the reverse reaction is spontaneous, or neither forward nor
reverse reaction is spontaneous because the system is at equilibrium.
ΔΗ
2220. kJ
J
AS = 7479.
K
OkJ
AG =
3co,(2) + 4H,0(1) → C,H,(8) + 50,(8)
Which is spontaneous?
this reaction
the reverse reaction
neither
AH = 852. kJ
J
AS =
K
AG = 0. kJ
Al,0,(:) + 2Fe(s) → 2Al(s) + Fe,0,(s)
Which is spontaneous?
this reaction
the reverse reaction
neither
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