Chemistry
9th Edition
ISBN: 9781133611097
Author: Steven S. Zumdahl
Publisher: Cengage Learning
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Chapter 20, Problem 73AE
Interpretation Introduction
Interpretation: The balanced equation for the reaction of hydrazine with oxygen is to be stated. The value of
Concept introduction: The expression to calculate the value of
To determine: The balanced equation for the reaction of hydrazine with oxygen; the value of
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Answer the following questions that relate to the chemistry of nitrogen.
(a) Two nitrogen atoms combine to form a nitrogen molecule, as represented by the following equation.
2 N(g) ® N2(g)
Using the table of average bond energies below, determine the enthalpy change, AH, for the reaction.
Average Bond
Energy (k) mol-1)
Bond
N-N
160
N=N
420
N°N
950
(b) The reaction between nitrogen and hydrogen to form ammonia is represented below.
N2(g) + 3 H2(g)® 2 NH3(g)
AH° = -92.2 kJ
Predict the sign of the standard entropy change, AS', for the reaction. Justify your answer.
(C) The value of AG° for the reaction represented in part (b) is negative at low temperatures but positive at high temperatures. Explain.
The conversion of graphite into diamond is an endothermic reaction
(AH = +3 kJ mol-1).
C(graphite) → C(diamond)
1
The enthalpy change of atomisation of diamond is smaller than that of
graphite.
The bond energy of the C-C bonds in graphite is greater than that in
diamond.
2
The enthalpy change of combustion of diamond is greater than that of
graphite.
3
Which statements are correct?
A 1, 2 and 3
B 1 and 2 only C 2 and 3 only D 1 only
(A) Balance this reaction. Then use the bond enthapies given in the table below to calculate the enthalpy of reaction for the balanced reaction. kJ/mol(B) Balance this reaction. Then use the bond enthapies given in the table below to calculate the enthalpy of reaction for the balanced reaction. kJ/mol(C) Balance this reaction. Then use the bond enthapies given in the table below to calculate the enthalpy of reaction for the balanced reaction kJ/mol
Chapter 20 Solutions
Chemistry
Ch. 20 - What are the two most abundant elements by mass in...Ch. 20 - Prob. 2RQCh. 20 - Prob. 3RQCh. 20 - What is the valence electron configuration for the...Ch. 20 - Prob. 5RQCh. 20 - Prob. 6RQCh. 20 - Table 19-14 lists some common nitrogen compounds...Ch. 20 - Prob. 8RQCh. 20 - Prob. 9RQCh. 20 - Prob. 10RQ
Ch. 20 - Prob. 1QCh. 20 - Prob. 2QCh. 20 - Prob. 3QCh. 20 - Diagonal relationships in the periodic table exist...Ch. 20 - Prob. 6QCh. 20 - Prob. 7QCh. 20 - Prob. 8QCh. 20 - All the Group 1A (1) and 2A (2) metals are...Ch. 20 - Prob. 10QCh. 20 - Prob. 13ECh. 20 - Prob. 14ECh. 20 - Prob. 15ECh. 20 - Prob. 16ECh. 20 - Prob. 17ECh. 20 - Prob. 18ECh. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - Electrolysis of an alkaline earth metal chloride...Ch. 20 - Prob. 24ECh. 20 - Prob. 25ECh. 20 - Prob. 26ECh. 20 - Boron hydrides were once evaluated for possible...Ch. 20 - Prob. 28ECh. 20 - Prob. 29ECh. 20 - Prob. 30ECh. 20 - Prob. 31ECh. 20 - Prob. 32ECh. 20 - Prob. 33ECh. 20 - Prob. 34ECh. 20 - The following illustration shows the orbitals used...Ch. 20 - Prob. 36ECh. 20 - Silicon is produced for the chemical and...Ch. 20 - Prob. 38ECh. 20 - The compound Pb3O4 (red lead) contains a mixture...Ch. 20 - Prob. 40ECh. 20 - Prob. 41ECh. 20 - Prob. 42ECh. 20 - Prob. 43ECh. 20 - Prob. 44ECh. 20 - Prob. 45ECh. 20 - Prob. 46ECh. 20 - Prob. 47ECh. 20 - Prob. 48ECh. 20 - Prob. 49ECh. 20 - Phosphate buffers are important in regulating the...Ch. 20 - Prob. 51ECh. 20 - Trisodium phosphate (TSP) is an effective grease...Ch. 20 - Prob. 53ECh. 20 - Prob. 54ECh. 20 - Prob. 55ECh. 20 - Complete and balance each of the following...Ch. 20 - Prob. 57ECh. 20 - Prob. 58ECh. 20 - How can the paramagnetism of O2 be explained using...Ch. 20 - Describe the bonding in SO2 and SO3 using the...Ch. 20 - Write the Lewis structure for O2F2. Predict the...Ch. 20 - Give the Lewis structure, molecular structure, and...Ch. 20 - Prob. 63ECh. 20 - Prob. 64ECh. 20 - Prob. 65ECh. 20 - Prob. 66ECh. 20 - Prob. 67ECh. 20 - Prob. 68ECh. 20 - Prob. 69ECh. 20 - Prob. 70ECh. 20 - Prob. 71ECh. 20 - Prob. 72ECh. 20 - Prob. 73AECh. 20 - The inert-pair effect is sometimes used to explain...Ch. 20 - How could you determine experimentally whether the...Ch. 20 - Prob. 76AECh. 20 - Prob. 77AECh. 20 - Prob. 78AECh. 20 - Prob. 79AECh. 20 - Draw Lewis structures for the AsCl4+ and AsCl6...Ch. 20 - Prob. 81AECh. 20 - Prob. 82AECh. 20 - Prob. 83AECh. 20 - What is a disproportionation reaction? Use the...Ch. 20 - Sulfur forms a wide variety of compounds in which...Ch. 20 - Prob. 86AECh. 20 - Prob. 87CWPCh. 20 - Prob. 88CWPCh. 20 - Prob. 89CWPCh. 20 - Prob. 90CWPCh. 20 - Prob. 91CWPCh. 20 - Nitrous oxide (N2O) can be produced by thermal...Ch. 20 - What is the hybridization of the central atom in...Ch. 20 - Prob. 94CWPCh. 20 - Prob. 95CWPCh. 20 - Prob. 96CWPCh. 20 - Prob. 97CPCh. 20 - Prob. 98CPCh. 20 - Lead forms compounds in the +2 and +4 oxidation...Ch. 20 - Prob. 100CPCh. 20 - Prob. 101CPCh. 20 - Prob. 102CPCh. 20 - You travel to a distant, cold planet where the...Ch. 20 - Prob. 104CPCh. 20 - Prob. 105CPCh. 20 - Prob. 106IPCh. 20 - Prob. 107IPCh. 20 - Although nitrogen trifluoride (NF3) is a thermally...Ch. 20 - While selenic acid has the formula H2SeO4 and thus...Ch. 20 - Prob. 110MPCh. 20 - Prob. 111MP
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