Chemistry for Engineering Students
4th Edition
ISBN: 9781337398909
Author: Lawrence S. Brown, Tom Holme
Publisher: Cengage Learning
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Question
Chapter 8, Problem 8.83PAE
Interpretation Introduction
Interpretation:
The effect of high surface tension on a substance vapor pressure and boiling point should be explained.
Concept introduction:
Surface tension is defined as the force acting on a liquid per unit length.
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Chapter 8 Solutions
Chemistry for Engineering Students
Ch. 8 - Prob. 1COCh. 8 - • describe the arrangement of atoms in the common...Ch. 8 - • use bind theory to describe bonding in solids.Ch. 8 - Prob. 4COCh. 8 - Prob. 5COCh. 8 - Prob. 6COCh. 8 - Prob. 7COCh. 8 - • explain the connection between intermolecular...Ch. 8 - Prob. 9COCh. 8 - Prob. 10CO
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- The lattice energy of KF is 794 kJ/mol, and the interionic distance is 269 pm. The Na—F distance in NaF, which has the same structure as KF, is 231 pm. Which of the following values is the closest approximation of the lattice energy of NaF: 682 kJ/mol, 794 kJ/mol, 924 kJ/mol, 1588 kJ/mol, or 3175 kJ/mol? Explain your answer.arrow_forwardThe lattice energy of LiF is 1023 kJ/mol, and the LiF distance is 201 pm. MgO crystallizes in the same structure as LiF but with a Mg—O distance of 205 pm. Which of the following values most closely approximates the lattice energy of MgO: 256 kJ/mol, 512 kJ/mol, 1023 kJ/mol, 2046 kJ/mol, or 4008 kJ/mol? Explain your choice.arrow_forwardThe lattice energy of LiF is 1023 kJ/mol, and the Li—F distance is 200.8 pm. NaF crystallizes in the same structure as LiF but with a Na—F distance of 231 pm. Which of the following values most closely approximates the lattice energy of NaF: 510, 890, 1023, 1175, or 4090 kJ/mol? Explain your choice.arrow_forward
- What is a driving force? Name two common and important driving forces, and give an example of each. What is entropy? Although the total energy of the universe is constant, is the entropy of the universe constant? What is a spontaneous process?arrow_forwardPredict the trend in lattice energy, from least negative to most negative, for the following compounds based on the ion charges and ionic radii; LiI, LiF, CaO, RbI.arrow_forwardEstimate the ionic radius of Cs+. The lattice energy of CsCl is 633 kJ/mol. For CsCl the Madelungconstant, M, is 1.763, and the Born exponent, n, is 10.7. The ionic radius of Cl– is known to be 1.81 Åarrow_forward
- 8.13 In which of the following states would NaCl be electrically conducting: (a) solid, (b) molten (i.e., melted), (c) dissolved in water? Explain.arrow_forwardKBr has a lattice energy -671 kJ/mol. Consider a hypothetical salt XY. X3+ has the same radius of K+ and Y3− has the same radius as Br−. Estimate the lattice energy of XYXY.arrow_forwardthe lattice energy of CaC2(s) is -2911 kJ/mol. calculate a value for the thermochemical radius of the carbide ion, C2^2-.arrow_forward
- Using the following data, calculate the lattice energy of calcium chloride: Ca2+(g) + 2Cl– (g) → CaCl2(s) ΔHlattice = ? Sublimation enthalpy of calcium ΔH = 177.8 kJ/mol First ionization energy of calcium ΔH = 590.2 kJ/mol Second ionization energy of calcium ΔH = 1144.2 kJ/mol First electron affinity of chlorine ΔH = –349 kJ/mol Heat of formation of CaCl2(s) ΔH = –795.4 kJ/mol Bond energy of Cl2 (see Table 2) Use Hess’s law to calculate the lattice energy of calcium chloride. set-up must show all the chemical equations and you must show how their H values add up to give your answer.arrow_forwardKBr has a lattice energy -671 kJ/mol . Consider a hypothetical salt XY. X2+ has the same radius of K+ and Y2− has the same radius as Br−. Estimate the lattice energy of XY.arrow_forwardDefine the term 'crystal lattice.’arrow_forward
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