Exam 12: Intermolecular Forces: Liquids and Solids

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Which of the following statements about viscosity are true: I) Viscosity is liquid's resistance to flow. II) Viscosity decreases with a decrease in temperature. III) Viscosity is not related to the forces between molecules in a liquid. IV) Viscous liquids have low rate flows.

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If 34 g of a solid of mol mass = 174 g/mol requires 21.3 kJ to melt it, what is the molar heat of fusion in kJ/mol?

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A liquid has a normal boiling point of 78°C and its vapor pressure is 400 mmHg at 50°C. To compute the molar heat of vaporization, one needs:

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Given the following information, calculate ΔH°(in kcal mol-1) for: I(g) + e- → I-(g) Given the following information, calculate ΔH°(in kcal mol-1) for: I(g) + e- → I-(g)

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Given the following information, calculate ΔH°(in kcal mol-1) for: I(g) + e- → I-(g) Given the following information, calculate ΔH°(in kcal mol-1) for:  I(g) + e- → I-(g)

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All sides are equal in length and all angles are right angles. There is an atom at each corner and one in the center. This is a simple cubic cell.

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A liquid has a molar heat of vaporization of 22.7 kJ/mol. Its normal boiling point is 459K. What is the vapor pressure, in mmHg, at 70°C?

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Vaporization occurs more readily with:

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According to the phase diagram given, which of the following is INCORRECT? According to the phase diagram given, which of the following is INCORRECT?

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CH4 probably has a lower boiling point at 1 atm than SnH4.

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The enthalpy of condensation is equal to, but opposite in sign from, the enthalpy of ________.

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Arrange in order by decreasing boiling point: CH3CH2OH, HOCH2CH2OH, C4H10

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If one compares compound A, composed of nonpolar molecules, with compound B, composed of polar molecules, and both molecules have the same molecular formula, then it is true that:

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A liquid is in equilibrium with its vapor. If some of the vapor is allowed to escape, what is the immediate result?

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Given the tabulated data, what is the electron affinity for chlorine? heat of sublimation for calcium +178 kJ/mol First ionization energy for calcium +590 kJ/mol Second ionization energy for calcium +1145 kJ/mol Heat of dissociation for chlorine +122 kJ/mol(Cl) Heat of formation for calcium chloride -796 kJ/mol Lattice energy of crystalline calcium chloride -2255 kJ/mol

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Arrange the following compounds in order of increasing boiling point: I) 1-propanol, CH3CH2CH2OH; II) 1,2-propanediol, CH3CH(OH)CH2OH; III) 1,2,3-propanetriol, (glycerol), HOCH2CH(OH)CH2OH.

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List the following ionic compounds in order of increasing solubility in water: RbI, CaO, KCl

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A liquid will "wet" a surface if:

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Arrange in order by decreasing boiling point: Cl2, I2, HI

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Given the following information, calculate ΔH°(in kcal mol-1) for: CaI2(s) → Ca+2(g) +2 I-(g) Given the following information, calculate ΔH°(in kcal mol-1) for: CaI<sub>2</sub>(s) → Ca<sup>+2</sup>(g) +2 I-(g)

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