4.) HX is used as a reagent in the reaction below. NH2 он + HX + :NEN: A. What functional-group transformation occurs in this reaction? B. What is the likely identity of HX? Verify your decision with the table of K, values in the back of your textbook.

Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter14: Elimination
Section: Chapter Questions
Problem 36CTQ
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4.) HX is used as a reagent in the reaction below.
NH2
он
+
HX
+ :NEN:
A. What functional-group transformation occurs in this reaction?
B. What is the likely identity of HX? Verify your decision with the table of Ka values in the back of your textbook.
Consider the following thermodynamic data for the reaction shown above.
ZHN
+ :NEN:
HO.
+
HX
+
AH°r (kJ/mol)
-386
260.1
30.00
-393.5
S° (J/mol K)
166
146.0
191.3
191.5
213.8
C. Does the reaction absorb or release heat? Justify with a calculation.
D. Based on the reaction equation given above, does entropy increase or decrease in this reaction?
E. Justify your answer to (D) with a calculation. Does your calculation agree with your prediction?
F. Is this reaction thermodynamically favorable at 25°C? Justify with a calculation.
G. Over what temperature range (in K) is the above reaction thermodynamically favorable?
H. Calculate the numerical value of the equilibrium constant at 25 °C for this reaction. Is your K value consistent with
your answer to F? Explain.
Transcribed Image Text:4.) HX is used as a reagent in the reaction below. NH2 он + HX + :NEN: A. What functional-group transformation occurs in this reaction? B. What is the likely identity of HX? Verify your decision with the table of Ka values in the back of your textbook. Consider the following thermodynamic data for the reaction shown above. ZHN + :NEN: HO. + HX + AH°r (kJ/mol) -386 260.1 30.00 -393.5 S° (J/mol K) 166 146.0 191.3 191.5 213.8 C. Does the reaction absorb or release heat? Justify with a calculation. D. Based on the reaction equation given above, does entropy increase or decrease in this reaction? E. Justify your answer to (D) with a calculation. Does your calculation agree with your prediction? F. Is this reaction thermodynamically favorable at 25°C? Justify with a calculation. G. Over what temperature range (in K) is the above reaction thermodynamically favorable? H. Calculate the numerical value of the equilibrium constant at 25 °C for this reaction. Is your K value consistent with your answer to F? Explain.
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