Chemistry: An Atoms First Approach
2nd Edition
ISBN: 9781305079243
Author: Steven S. Zumdahl, Susan A. Zumdahl
Publisher: Cengage Learning
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Chapter 19, 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.
Hydrazine, N2H4, burns in oxygen as follows:
N2H4 + O2 → N2 + 2H2O
[The bond energies in kJ/mol are: N-H = 388; N-N 163; N≡N 944; O-H 463; O=O 496]
Draw the chemical structures of the reactants and products and
give the formula to calculate enthalpy change in a reaction, ΔH.
Testosterone is an anabolic steroid. The structure of testosterone is shown below.
What is the idealised bond angle at the indicated atom (ii) ?
Hint: atom (iv) has been completed for you as an example.
(iv) bond angle: 109.5°, geometry of the electron pairs: tetrahedral, shape of the
bonds: tetrahedral
·····|||I
H
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Chapter 19 Solutions
Chemistry: An Atoms First Approach
Ch. 19 - What are the two most abundant elements by mass in...Ch. 19 - Prob. 2RQCh. 19 - Prob. 3RQCh. 19 - Prob. 4RQCh. 19 - Prob. 5RQCh. 19 - Prob. 6RQCh. 19 - Prob. 7RQCh. 19 - Prob. 8RQCh. 19 - Prob. 9RQCh. 19 - Prob. 10RQ
Ch. 19 - Prob. 1QCh. 19 - Prob. 2QCh. 19 - Prob. 3QCh. 19 - Diagonal relationships in the periodic table exist...Ch. 19 - Prob. 5QCh. 19 - Prob. 6QCh. 19 - Prob. 7QCh. 19 - Prob. 8QCh. 19 - Prob. 9QCh. 19 - Prob. 10QCh. 19 - Prob. 11ECh. 19 - Prob. 12ECh. 19 - Prob. 13ECh. 19 - Prob. 14ECh. 19 - Prob. 15ECh. 19 - Prob. 16ECh. 19 - Prob. 17ECh. 19 - Prob. 18ECh. 19 - Prob. 19ECh. 19 - Prob. 20ECh. 19 - Prob. 21ECh. 19 - Prob. 22ECh. 19 - Prob. 23ECh. 19 - Prob. 24ECh. 19 - Consider element 113. What is the expected...Ch. 19 - Prob. 26ECh. 19 - Prob. 27ECh. 19 - Prob. 28ECh. 19 - Prob. 29ECh. 19 - Prob. 30ECh. 19 - Prob. 31ECh. 19 - Prob. 32ECh. 19 - Prob. 33ECh. 19 - Prob. 34ECh. 19 - The following illustration shows the orbitals used...Ch. 19 - Prob. 36ECh. 19 - Silicon is produced for the chemical and...Ch. 19 - Prob. 38ECh. 19 - Prob. 39ECh. 19 - Prob. 40ECh. 19 - Prob. 41ECh. 19 - Prob. 42ECh. 19 - Prob. 43ECh. 19 - Prob. 44ECh. 19 - Prob. 45ECh. 19 - Prob. 46ECh. 19 - Prob. 47ECh. 19 - Prob. 48ECh. 19 - Prob. 49ECh. 19 - Prob. 50ECh. 19 - Prob. 51ECh. 19 - Prob. 52ECh. 19 - Use bond energies to estimate the maximum...Ch. 19 - Prob. 54ECh. 19 - Prob. 55ECh. 19 - Prob. 56ECh. 19 - Prob. 57ECh. 19 - Prob. 58ECh. 19 - Prob. 59ECh. 19 - Describe the bonding in SO2 and SO3 using the...Ch. 19 - Prob. 61ECh. 19 - Prob. 62ECh. 19 - Prob. 63ECh. 19 - Prob. 64ECh. 19 - Prob. 65ECh. 19 - Prob. 66ECh. 19 - Prob. 67ECh. 19 - Prob. 68ECh. 19 - Prob. 69ECh. 19 - Prob. 70ECh. 19 - Prob. 71ECh. 19 - Prob. 72ECh. 19 - Prob. 73AECh. 19 - The inert-pair effect is sometimes used to explain...Ch. 19 - Prob. 75AECh. 19 - Prob. 76AECh. 19 - Prob. 77AECh. 19 - Prob. 78AECh. 19 - Prob. 79AECh. 19 - Draw Lewis structures for the AsCl4+ and AsCl6...Ch. 19 - Prob. 81AECh. 19 - Prob. 82AECh. 19 - Prob. 83AECh. 19 - Prob. 84AECh. 19 - Prob. 85AECh. 19 - Prob. 86AECh. 19 - Prob. 87CWPCh. 19 - Prob. 88CWPCh. 19 - Prob. 89CWPCh. 19 - Prob. 90CWPCh. 19 - What is the hybridization of the underlined...Ch. 19 - Prob. 92CWPCh. 19 - What is the hybridization of the central atom in...Ch. 19 - Prob. 94CWPCh. 19 - Prob. 95CWPCh. 19 - Prob. 96CWPCh. 19 - Prob. 97CPCh. 19 - Prob. 98CPCh. 19 - Prob. 99CPCh. 19 - Prob. 100CPCh. 19 - Prob. 101CPCh. 19 - Prob. 102CPCh. 19 - Prob. 103CPCh. 19 - Prob. 104CPCh. 19 - Prob. 105CPCh. 19 - Prob. 106IPCh. 19 - Prob. 107IPCh. 19 - Prob. 108IPCh. 19 - Prob. 109IPCh. 19 - Prob. 110MPCh. 19 - Prob. 111MP
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- Using the standard enthalpy of formation data in Appendix G, calculate the bond energy of the carbon-sulfur double bond in CS2.arrow_forwardBond Enthalpy When atoms of the hypothetical element X are placed together, they rapidly undergo reaction to form the X2 molecule: X(g)+X(g)X2(g) a Would you predict that this reaction is exothermic or endothermic? Explain. b Is the bond enthalpy of X2 a positive or a negative quantity? Why? c Suppose H for the reaction is 500 kJ/mol. Estimate the bond enthalpy of the X2 molecule. d Another hypothetical molecular compound, Y2(g), has a bond enthalpy of 750 kJ/mol, and the molecular compound XY(g) has a bond enthalpy of 1500 kJ/mol. Using bond enthalpy information, calculate H for the following reaction. X2(g)+Y2(g)2XY(g) e Given the following information, as well as the information previously presented, predict whether or not the hypothetical ionic compound AX is likely to form. In this compound, A forms the A+ cation, and X forms the X anion. Be sure to justify your answer. Reaction: A(g)+12X2(g)AX(s)The first ionization energy of A(g) is 400 kJ/mol. The electron affinity of X(g) is 525 kJ/mol. The lattice energy of AX(s) is 100 kJ/mol. f If you predicted that no ionic compound would form from the reaction in Part e, what minimum amount of AX(s) lattice energy might lead to compound formation?arrow_forwardLl.59.arrow_forward
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