(a) Is this reaction an exothermic or an endothermic reaction? Explain your answer. (2 marks) (b) Propose the two elementary steps for this reaction based on the energy profile and state the intermediate. (c) Given that the transition state 2 (TS2) has a structure similar to that of transition state 1 (TS1), propose a possible structure for TS2.
(a) Is this reaction an exothermic or an endothermic reaction? Explain your answer. (2 marks) (b) Propose the two elementary steps for this reaction based on the energy profile and state the intermediate. (c) Given that the transition state 2 (TS2) has a structure similar to that of transition state 1 (TS1), propose a possible structure for TS2.
Chapter17: Spontaneity, Entropy, And Free Energy
Section: Chapter Questions
Problem 23Q: Monochloroethane (C2H5Cl) can be produced by the direct reaction of ethane gas (C2H6) with chlorine...
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Question
( plz a b c with detail explanation )
Transcribed Image Text:Consider the following arbitrary chemical reaction and its corresponding energy profile:
X2(g) + 2YZ@) –→ 2XZg) + Y2g)
TS2
TS1
X
Y
+YZ (g)
E2
=25 kJ/mol
Eal
=10 kJ/mol
XY () + XZ () +YZ (2)
' (g)
+Y2 «g)
2XZ (g)
X2 (2) + 2YZ g)
Reaction coordinate
(a) Is this reaction an exothermic or an endothermic reaction? Explain your answer. (2 marks)
(b) Propose the two elementary steps for this reaction based on the energy profile and state the
intermediate.
(c) Given that the transition state 2 (TS2) has a structure similar to that of transition state 1 (TS1),
propose a possible structure for TS2.
(d) Which elementary step is the rate-determining step (r.d.s)? Explain your answer.
(e) Given that the rate constant of this reaction at 25°C is 0.12 M-'s-' and the activation energy is
30 kJ/mol, what would be the rate constant when the temperature has increased to 77°C?
++
.....N
Energy
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