EBK CHEMISTRY:CENTRAL SCIENCE
14th Edition
ISBN: 9780134554570
Author: Brown
Publisher: PEARSON
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Chapter 7, Problem 102AE
Which of the following is the expected product of the reaction of K(s) and H2(g)? (i) KH(s), (ii) K2H(s), (iii) KH2(s), (iv) K2H2(s), or (v) K(s) andH2(g) will not react with one another.
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The formation of KCl(s) from K(s) and Cl2(g) is an exothermic process (DHf for KCl(s) is negative). Considering the steps
involved in the Born-Habor cycle, which of the following steps contributes to the stability of KCl(s)?
Dissociation of Cl2(g)
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3. Chemical Formulas and Thermodynamics (continued)
From the bond energy data given below, (a) write a balanced equation for the formation of
C.
liquid formic acid from its elements (solid carbon, hydrogen gas and oxygen gas) and (b) calculate its
reaction energy in kJ.
415 kJ/mol
345 kl/mol
460 kJ/mol
490 kJ/mol
436 kJ/mol
C-H
O-H
C-o
360 kl/mol
O=0
800 kJ/mol
799 kl/mol
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C=0
a. Write the equation for formation of Formic Acid from its elements:
b. Show your AHrmx calculations. It may help to review the Lewis Structure of formic acid on page 4. Box
your final answer.
The ionic compound CaO crystallizes with the same structureas sodium chloride (Figure 8.3). (a) In this structure,how many O2- are in contact with each Ca2+ ion (Hint: Rememberthe pattern of ions shown in Figure 8.3 repeats overand over again in all three directions.) (b) Would energy beconsumed or released if a crystal of CaO was converted toa collection of widely separated Ca—O ion pairs? (c) Fromthe ionic radii given in Figure 7.8, calculate the potentialenergy of a single Ca—O ion pair that is just touching(the magnitude of electronic charge is given on the insideback cover). (d) Calculate the energy of a mole of such pairs.How does this compare to the lattice energy of CaO? (e)What factor do you think accounts for most of the discrepancybetween the energies in part (d)—the bonding in CaOis more covalent than ionic, or the electrostatic interactionsin a crystal lattice are more complicated than those in a singleion pair?
Chapter 7 Solutions
EBK CHEMISTRY:CENTRAL SCIENCE
Ch. 7.3 - Hypothetical elements X and Y form a molecule XY2,...Ch. 7.3 - Prob. 7.1.2PECh. 7.3 - Prob. 7.2.1PECh. 7.3 -
Arrange Be, C, K, and Ca in order of increasing...Ch. 7.3 - Arrange the following atoms and ions in order of...Ch. 7.3 - Prob. 7.3.2PECh. 7.3 - Prob. 7.4.1PECh. 7.3 - Prob. 7.4.2PECh. 7.4 - Prob. 7.5.1PECh. 7.4 - Prob. 7.5.2PE
Ch. 7.4 - Consider the following statements about first...Ch. 7.4 - Prob. 7.6.2PECh. 7.4 - Prob. 7.7.1PECh. 7.4 -
Write the electron configurations for (a) Ga3+...Ch. 7.6 - Prob. 7.8.1PECh. 7.6 - Prob. 7.8.2PECh. 7.6 - Prob. 7.9.1PECh. 7.6 - Prob. 7.9.2PECh. 7.7 - Prob. 7.10.1PECh. 7.7 - Prob. 7.10.2PECh. 7 - Prob. 1DECh. 7 - Prob. 1ECh. 7 -
7.2 Which of these spheres represents F, which...Ch. 7 - Prob. 3ECh. 7 - Prob. 4ECh. 7 - Prob. 5ECh. 7 - Prob. 6ECh. 7 - Prob. 7ECh. 7 - Prob. 8ECh. 7 - Prob. 9ECh. 7 - Prob. 10ECh. 7 - Prob. 11ECh. 7 -
7.12 Moseley's experiments on X rays emitted from...Ch. 7 - Among elements 1-18, which element or elements...Ch. 7 - Prob. 14ECh. 7 - Detailed calculations show that the value of Zeff...Ch. 7 - Detailed calculations show that the value of Zeff...Ch. 7 - Which will experience the greater effective...Ch. 7 - Arrange the following atoms in order of increasing...Ch. 7 - Prob. 19ECh. 7 - Prob. 20ECh. 7 - Tungsten has the highest melting point of any...Ch. 7 - Prob. 22ECh. 7 - Estimate the As-I bond length from the data in...Ch. 7 - Prob. 24ECh. 7 - Using only the periodic table, arrange each set of...Ch. 7 - Using only the periodic table, arrange each set of...Ch. 7 - Prob. 27ECh. 7 - Prob. 28ECh. 7 - Which neutral atom is isoelectronic with each of...Ch. 7 - Some ions do not have a corresponding neutral atom...Ch. 7 - Consider the isoelectronic ions F- and Na+. (a)...Ch. 7 - Prob. 32ECh. 7 - Prob. 33ECh. 7 - Arrange each of the following sets of atoms and...Ch. 7 - Prob. 35ECh. 7 - In the ionic compoundsLiF,NaCI,KBr, andRbl, the...Ch. 7 - Prob. 37ECh. 7 -
7.38 Write equations that show the process for...Ch. 7 - Prob. 39ECh. 7 - Prob. 40ECh. 7 - Prob. 41ECh. 7 - (a) What is the trend in first ionization energies...Ch. 7 - Prob. 43ECh. 7 - Prob. 44ECh. 7 - Prob. 45ECh. 7 - Prob. 46ECh. 7 - Prob. 47ECh. 7 - Prob. 48ECh. 7 - Write an equation for the second electron affinity...Ch. 7 - If the electron affinity for an element is a...Ch. 7 - Prob. 51ECh. 7 -
7.52 What is the relationship between the...Ch. 7 - Prob. 53ECh. 7 - Consider the following equation: Ca + (g) + e-...Ch. 7 -
7.55(a) Does metallic character increase,...Ch. 7 - Prob. 56ECh. 7 - Prob. 57ECh. 7 - Prob. 58ECh. 7 - Predict whether each of the following oxides is...Ch. 7 - Prob. 60ECh. 7 - Would you expect manganese(II) oxide, MnO, react...Ch. 7 - Prob. 62ECh. 7 - Prob. 63ECh. 7 - An element X reacts with oxygen to form X02 and...Ch. 7 - Prob. 65ECh. 7 - Prob. 66ECh. 7 - Prob. 67ECh. 7 - Prob. 68ECh. 7 - Prob. 69ECh. 7 - Write a balanced equation for the reaction that...Ch. 7 - (a) As described in Section 7.7 , the alkali...Ch. 7 - Prob. 72ECh. 7 - Prob. 73ECh. 7 - Prob. 74ECh. 7 - Prob. 75ECh. 7 - Prob. 76ECh. 7 - Prob. 77ECh. 7 - Prob. 78ECh. 7 - Consider the stable elements through lead (Z =...Ch. 7 -
17.80]Figure 7.4 shows the radial probability...Ch. 7 - (a) If the core electrons were totally effective...Ch. 7 - Prob. 82AECh. 7 - Prob. 83AECh. 7 - Prob. 84AECh. 7 - Prob. 85AECh. 7 - The following observations are made about two...Ch. 7 - Prob. 87AECh. 7 - Prob. 88AECh. 7 - Prob. 89AECh. 7 - Prob. 90AECh. 7 - Explain the variation in the ionization energies...Ch. 7 - Prob. 92AECh. 7 - Prob. 93AECh. 7 - Prob. 94AECh. 7 - Prob. 95AECh. 7 - Prob. 96AECh. 7 - Prob. 97AECh. 7 - The electron affinities. in kJ/mol, for the group...Ch. 7 -
7.99 Hydrogen is an unusual element because it...Ch. 7 - Prob. 100AECh. 7 - Prob. 101AECh. 7 - Which of the following is the expected product of...Ch. 7 - Elemental cesium reacts more violently with water...Ch. 7 - Prob. 104AECh. 7 - Prob. 105AECh. 7 - Prob. 106AECh. 7 - Prob. 107AECh. 7 - Prob. 108AECh. 7 - Prob. 109IECh. 7 - Prob. 110IECh. 7 - Prob. 111IECh. 7 - Mercury in the environment can exist in oxidation...Ch. 7 - When magnesium metal is burned in air (Figure 3.6...Ch. 7 - Prob. 114IECh. 7 - Prob. 115IE
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- Determine the crystal lattice energy for MgCl2, given the following information: Cl2(g) → Mgčl2(s)AH°f = -642 kJ/mol 2+ (Mg - AHvaporization = 147.7 kJ/mol, Mg- Ejionization = 2188.4 kl/mol, Cl2 - EBond = 248 kJ/mol, Cl" - Ejonization = -349 kJ/mol)arrow_forwardGiven the following data, calculate the lattice energy of barium chloride, BaCl. IE 1BA= 502.7 kJ mol, IE 2Ba = 965.0 kJ mol, AHsub (Ba) =175.6 kJ moľ, EA = 349.0 kJ mol, BDE (CI - CI) = 243.4 kJ mol, AH(BaCl) = -858.6 kJ molarrow_forward5.) Electron Configurations for Ions: Supply the ground state electron configurations for the following ions. You many use the short-hand notation (e.g. Na*: [He]2s 2p°). (a) N (b) Mg*. (c) O (d) Sc* (e) Sn2+ (f) Ar 6.) Formulas of Ions: Predict the formulas of the most stable ions of the following elements (a) Na (b) Mg (c) S (d) Al (e) Br (f) Parrow_forward
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