23. A reaction proceeds by a series of elementary steps as shown below. The activation energy and heat of reaction are shown for each step. Step No. Elementary Step Activation Energy Enthalpy of Reaction 1 AB → A + ½B2 12 kJ 35 kJ 2 C + B, → CB, 2.5 kJ -29 kJ 3 АС — А + С 7.5 kJ 21 kJ a) What is the overall equation for this reaction? Show your work. b) What is the heat of reaction for the overall equation? Show your work. c) Which step is the rate determining step and why?

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23. A reaction proceeds by a series of elementary steps as shown below. The activation energy and heat of
reaction are shown for each step.
Step No.
Elementary Step
Activation Energy
Enthalpy of Reaction
1
АВ — А + %2B,
12 kJ
35 kJ
2
C + B2 → CB,
2.5 kJ
-29 kJ
3
АС — А + С
7.5 kJ
21 kJ
a) What is the overall equation for this reaction? Show your work.
b) What is the heat of reaction for the overall equation? Show your work.
c) Which step is the rate determining step and why?
d) Using the space provided below, draw and label a potential energy diagram to represent the
overall equation in (a). I
Transcribed Image Text:23. A reaction proceeds by a series of elementary steps as shown below. The activation energy and heat of reaction are shown for each step. Step No. Elementary Step Activation Energy Enthalpy of Reaction 1 АВ — А + %2B, 12 kJ 35 kJ 2 C + B2 → CB, 2.5 kJ -29 kJ 3 АС — А + С 7.5 kJ 21 kJ a) What is the overall equation for this reaction? Show your work. b) What is the heat of reaction for the overall equation? Show your work. c) Which step is the rate determining step and why? d) Using the space provided below, draw and label a potential energy diagram to represent the overall equation in (a). I
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