CHEMISTRY-TEXT
8th Edition
ISBN: 9780134856230
Author: Robinson
Publisher: PEARSON
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Chapter 6, Problem 6.87SP
The estimated lattice energy for
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g
6.941
mol
atomic mass
electronegativity
0.98
kJ
59.6
mol
electron affinity
kJ
520.2
mol
ionization energy
kJ
3.0
mol
heat of fusion
Does the following reaction absorb or release energy?
O release
O absorb
(1) Li (g) + e
Li(g)
O Can't be decided with the data given.
Is it possible to calculate the amount of energy absorbed
or released by reaction (1) using only the data above?
O yes
no
If you answered yes to the previous question, enter the
amount of energy absorbed or released by reaction (1):
I kJ/mol
Does the following reaction absorb or release energy?
O release
O absorb
(2) Li(g) → Li (g) + e
O Can't be decided with the data given.
Is it possible to calculate the amount of energy absorbed
or released by reaction (2) using only the data above?
O yes
O no
If you answered yes to the previous question, enter the
amount of energy absorbed or released by reaction (2):
I kJ/mol
The lattice energy of potassium iodide is the energy required for the following reaction. KI(s) → K+(g) + I−(g) ΔHrxn = ΔHlattice
Use the Born-Haber cycle to calculate ΔHlattice for KI(s) from the information given below.
Equation 1: 2 K(s) + I2(g) → 2 KI(s)
ΔH1 = −655 kJ/mol
Equation 2: K(s) → K(g)
ΔH2 = 89 kJ/mol
Equation 3: I2(g) → 2 I(g)
ΔH3 = 214 kJ/mol
Equation 4: K(g) → K+(g) + e−
ΔH4 = 419 kJ/mol
Equation 5: I(g) + e− → I−(g)
ΔH5 = −294 kJ/mol
Consider the following data for nickel:
atomic mass
electronegativity
electron affinity
ionization energy
heat of fusion
58.693
1.91
112.
737.1
g
mol
17.2
kJ
mol
kJ
mol
kJ
mol
Does the following reaction absorb or release energy?
(1) Ni (g) → Ni(g) + e
Is it possible to calculate the amount of energy absorbed
or released by reaction (1) using only the data above?
If you answered yes to the previous question, enter the
amount of energy absorbed or released by reaction (1):
Does the following reaction absorb or release energy?
(2) Ni' (g) + e Ni (g)
-
Is it possible to calculate the amount of energy absorbed
or released by reaction (2) using only the data above?
If you answered yes to the previous question, enter the
amount of energy absorbed or released by reaction (2):
Orelease
O absorb
O Can't be decided with the data given.
O yes
O no
kJ/mol
O release
O absorb
O Can't be decided with the data given.
O yes
O no
kJ/mol
Chapter 6 Solutions
CHEMISTRY-TEXT
Ch. 6 - Prob. 6.1PCh. 6 - APPLY 6.2 Which of the following sets of ions are...Ch. 6 - Which atom or ion has the largest radius:...Ch. 6 - Conceptual APPLY 6.4 Which of the following...Ch. 6 - Use the periodic table to order the elements from...Ch. 6 - Given the orbital filling diagrams for the valence...Ch. 6 - Which has the largest third ionization energy: Be,...Ch. 6 - Conceptual APPLY 6.8 The figure on the right...Ch. 6 - Order the following elements from least to most...Ch. 6 - Conceptual APPLY 6.10 Which of the indicated three...
Ch. 6 - What electron configuration does the strontium...Ch. 6 - Prob. 6.12ACh. 6 - Prob. 6.13PCh. 6 - APPLY 6.14 Calculate the energy of electrostatic...Ch. 6 - Which substance has the largest lattice energy:...Ch. 6 - One of the following pictures represents NaCl and...Ch. 6 - Prob. 6.17PCh. 6 - What structural features do ionic liquids havethat...Ch. 6 - PROBLEM 6.18 Compare the following two ionic...Ch. 6 - PROBLEM 6.19 An ionic liquid consisting of a bulky...Ch. 6 - Where on the periodic table would you find the...Ch. 6 - Which of the following spheres is likely to...Ch. 6 - Circle the approximate part or parts of the...Ch. 6 - Prob. 6.24CPCh. 6 - This figure represents the successive ionization...Ch. 6 - In the following drawings, red spheres represent...Ch. 6 - Which of the following drawings is more likely to...Ch. 6 - Prob. 6.28CPCh. 6 - Which of the following alkali metal halides has...Ch. 6 - Which of the following alkali metal halides has...Ch. 6 - Three binary compounds are represented on the...Ch. 6 - Prob. 6.32CPCh. 6 - Prob. 6.33CPCh. 6 - What is the difference between a covalent bond and...Ch. 6 - Prob. 6.35SPCh. 6 - What is the difference between a molecule and an...Ch. 6 - Prob. 6.37SPCh. 6 - How many protons and electrons are in each of the...Ch. 6 - What is the identity of the element X in the...Ch. 6 - Prob. 6.40SPCh. 6 - Prob. 6.41SPCh. 6 - Prob. 6.42SPCh. 6 - Prob. 6.43SPCh. 6 - What doubly positive ion has the following...Ch. 6 - Prob. 6.45SPCh. 6 - Prob. 6.46SPCh. 6 - Which element in the transition-metal series Sc...Ch. 6 - Prob. 6.48SPCh. 6 - Prob. 6.49SPCh. 6 - Order the following ions from smallest to largest:...Ch. 6 - Order the following ions from smallest to largest:...Ch. 6 - Which ion has a larger atomic radius, Cu+ or Cu2+...Ch. 6 - Which ion hasa larger atomic radius, Fe2+ or Fe3+...Ch. 6 - The following ions all have the same number of...Ch. 6 - Which of the ions Se2,F,O2 and Rb+ has the largest...Ch. 6 - Which group of elements in the periodic table has...Ch. 6 - Prob. 6.57SPCh. 6 - Which element in each of the following sets has...Ch. 6 - Order the elements in each set from the smallest...Ch. 6 - (a) Which has the smaller second ionization...Ch. 6 - (a) Which has the smaller fourth ionization...Ch. 6 - Three atoms have the following electron...Ch. 6 - Three atoms have the following electron...Ch. 6 - The first four ionization energies in kJ/mol of a...Ch. 6 - The first four ionization energies in kJ/mol of a...Ch. 6 - Prob. 6.66SPCh. 6 - Prob. 6.67SPCh. 6 - Prob. 6.68SPCh. 6 - Prob. 6.69SPCh. 6 - Why is energy usually released when an electron is...Ch. 6 - Why does ionization energy increase regularly...Ch. 6 - No element has a negative second electron...Ch. 6 - Why does phosphorus have a less negative electron...Ch. 6 - Prob. 6.74SPCh. 6 - What noble-gas configurations and charge are the...Ch. 6 - Each of the following pairs of elements will react...Ch. 6 - Each of the following pairs of elements will react...Ch. 6 - Element X reacts with element Y to give a product...Ch. 6 - Element X reacts with element Y to give a product...Ch. 6 - Calculate the energy change in kilojoules per mole...Ch. 6 - Prob. 6.81SPCh. 6 - Find the lattice energy of LiBr(s) in Table 6.3,...Ch. 6 - Look up the lattice energies in Table 6.3, and...Ch. 6 - Born-4-Iaber cycles, such as those shown in...Ch. 6 - Calculate a lattice energy for CaH2(s) in...Ch. 6 - Calculate the overall energy change in kilojoules...Ch. 6 - The estimated lattice energy for CsF2(s) is +2347...Ch. 6 - Calculate the overall energy change in kilojoules...Ch. 6 - Use the data in Problem 6.88 to calculate an...Ch. 6 - Use the data and the result in Problem 6.84 to...Ch. 6 - Prob. 6.91SPCh. 6 - Calculate overall energy changes in kilojoules per...Ch. 6 - Prob. 6.93SPCh. 6 - We saw in Section 6.7 that the reaction of solid...Ch. 6 - Draw a Born—Haber cycle for the reaction of sodium...Ch. 6 - Use the following information plus the data given...Ch. 6 - Prob. 6.97SPCh. 6 - Prob. 6.98SPCh. 6 - Order the following compounds according to their...Ch. 6 - Prob. 6.100MPCh. 6 - Heating elemental cesium and platinum together for...Ch. 6 - Given the following information, construct a...Ch. 6 - Consider the electronic structure of the element...Ch. 6 - Prob. 6.104MPCh. 6 - The ionization energy of an atom can be measured...
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- Compare the electron affinity of fluorine to the ionization energy of sodium. Does the process of an electron being pulled from the sodium atom to the fluorine atom have a negative or a positive E? Why is NaF a stable compound? Does the overall formation of NaF have a negative or a positive E? How can this be?arrow_forwardConsider the reactions of silver metal, Ag(s), with each of the halogens: fluorine, F2(g), chlorine, Cl2(g), and bromine, Br2(l). What chapter data could you use to decide which reaction is most exothermic? Which reaction is that?arrow_forwardThe lattice energy of an ionic solid such as NaCl is the enthalpy change H for the process in which the solid changes to ions. For example, NaCl(s)Na+(g)+Cl(g)H=786kJ/mol Assume that the ionization energy and electron a affinity are H values for the processes defined by those terms. The ionization energy of Na is 496 kJ/mol. Use this, the electron affinity from Table 8.4, and the lattice energy of NaCl to calculate H for the following process: Na(g)+Cl(g)NaCl(s)arrow_forward
- Calculate the lattice energy of potassium fluoride, KF, using the BornHaber cycle. Use thermodynamic data from Appendix C to obtain the enthalpy changes for each step. (Note: You will obtain a slightly different answer if you use values given in Chapter 8 for the ionization energy and electron affinity, which are energy values at 0 K rather than the enthalpy changes at 298 K.)arrow_forwardSolid phosphorus pentabromide, PBr5, has been shown to have the ionic structure [PBr4] [Br]. Write the electron-dot formula of the PBr4+ cation.arrow_forwardThe standard enthalpies of formation for S(g), F(g), SF4(g), and SF6(g) are + 278.8, + 79.0, 775, and 1209 kJ/mol, respectively. a. Use these data to estimate the energy of an SF bond. b. Compare your calculated value to the value given in Table 8.5. What conclusions can you draw? c. Why are the Ht0 values for S(g) and F(g) not equal to zero, since sulfur and fluorine are elements?arrow_forward
- Given the following data calculate H for the reaction On the basis of the enthalpy change, is this a useful reaction for the synthesis of ammonia?arrow_forward6.941 mol atomic mass electronegativity 0.98 kJ 59.6 mol electron affinity kJ 520.2 mol ionization energy kJ 3.0 mol heat of fusion Does the following reaction absorb or release energy? O release O absorb (1) Li (g) + e Li(g) O Car be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? O yes O no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (1): O k/mol Does the following reaction absorb or release energy? O release O absorb (2) Li(g) → Li (g) + e O Can't be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? O yes O no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): I kJ/molarrow_forwardGiven the following information, construct a Born-Haber cycle to calculate the lattice energy of CrCl₂I(s): Net energy change for the formation of CrCl₂I(s) = -420 kJ/mol Bond dissociation energy for I2(g) = +243 kJ/mol Bond dissociation energy for Cl2(g) for Cl2(g) for 12(g) = +151 kJ/mol Heat of sublimation for I2(s) = +62 kJ/mol Heat of sublimation for Cr(s) = +397 kJ/mol = E₁₁ for Cr(g) = 652 kJ/mol E₁₂ for Cr(g) == 1588 kJ/mol E₁3 for Cr(g) = 2882 kJ/mol Eea for Cl(g)=-349 kJ/mol === Eea for I(g) = -295 kJ/molarrow_forward
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