tion with whole-number coefficients. What is AH for the reaction represented by this equatio mol. pe thermodynamically-favored, the forward reaction or the reverse reaction? n were written to consume liquid bromine, Bry(1), instead of bromine gas, would you expect the se (become more positive), decrease (become more negative), or stay the same?

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Consider the reaction of hydrogen with gaseous bromine, Brz(g), to form hydrogen bromide:
1/2 H2(g) + 1/2 Br2(g)= HBr(9)
AH = -72.5 kJ
(a) What is the enthalpy change for the reverse reaction?
AHreverse = 145
x k/mol.
(b) Balance the forward reaction with whole-number coefficients. What is AH for the reaction represented by this equation?
AH - -290
X k/mol.
(c) Which is more likely to be thermodynamically-favored, the forward reaction or the reverse reaction?
The forward reaction.
(d) If the (forward) reaction were written to consume liquid bromine, Bry(1), instead of bromine gas, would you expect the
magnitude of AH to increase (become more positive), decrease (become more negative), or stay the same?
AH should increase
Transcribed Image Text:Consider the reaction of hydrogen with gaseous bromine, Brz(g), to form hydrogen bromide: 1/2 H2(g) + 1/2 Br2(g)= HBr(9) AH = -72.5 kJ (a) What is the enthalpy change for the reverse reaction? AHreverse = 145 x k/mol. (b) Balance the forward reaction with whole-number coefficients. What is AH for the reaction represented by this equation? AH - -290 X k/mol. (c) Which is more likely to be thermodynamically-favored, the forward reaction or the reverse reaction? The forward reaction. (d) If the (forward) reaction were written to consume liquid bromine, Bry(1), instead of bromine gas, would you expect the magnitude of AH to increase (become more positive), decrease (become more negative), or stay the same? AH should increase
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