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Exam 12: Intermolecular Forces and Liquids

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Question 41

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Which one of the following sets of ions are listed in order of lowest to highest hydration energy?

A) H⁺ < Na⁺ < Mg²⁺
B) Mg²⁺ < Ca²⁺ < Ba²⁺
C) Mg²⁺ < Ba²⁺ < Ca²⁺
D) Ca²⁺ < K⁺ < Rb⁺
E) Rb⁺ < K⁺ < Ca²⁺

F) A) and E)
G) A) and D)

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Question 42

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________ is a measure of the degree to which the electron cloud surrounding an atom or molecule can be distorted in an electric field.

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Question 43

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Which intermolecular force or bond is responsible for the density of H₂O(s) being less than that of H₂O( ) ?

On a relative basis,the weaker the intermolecular forces in a substance are,

At 75.0 ^$\circ$ C,water has an equilibrium vapor pressure of 289.1 mm Hg.If 4.22 g H₂O is sealed in an evacuated 5.00 L flask and heated to 75.0 ^$\circ$ C,what mass of H₂O will be found in the gas phase when liquid-vapor equilibrium is established? Assume any liquid remaining in the flask has a negligible volume.(R = 0.08206 L.atm/mol.K,1 atm = 760 mm Hg)

Which of the following statements concerning induced dipole/induced dipole forces is/are CORRECT? 1) In general,induced dipole/induced dipole interactions decrease as the size of a molecule increases. 2) Induced dipole/induced dipole forces are the attractive forces in molecular solids consisting of nonpolar molecules. 3) Induced dipole/induced dipole forces exist in both polar and nonpolar molecular solids.

When a water molecule forms a hydrogen bond with another water molecule,which atoms are involved in the interaction?

A liquid has an enthalpy of vaporization of 30.4 kJ/mol.At 269 K it has a vapor pressure of 102 mmHg.What is the normal boiling point of this liquid? (R = 8.314 J/(K· mol) )

The heat of vaporization of benzene,C₆H₆,is 30.7 kJ/mol at its boiling point of 80.1 ^$\circ$ C.How much energy in the form of heat is required to vaporize 148 g benzene at its boiling point?

A molecule will $\underline{\text{always }}$ be polar if it ___.

For a particular liquid,raising its temperature from 321 K to 352 K causes its vapor pressure to double.What is the enthalpy of vaporization of this liquid? (R = 8.314 J/K · mol)

The ________ equation relates the equilibrium vapor pressure of a volatile liquid to the molar enthalpy of vaporization at a given temperature.

If 3.21 g of water is sealed in an evacuated 2.52 L flask and heated to the normal boiling point of 373 K,what is the pressure in the flask? (R = 0.08206 L.atm/mol.K)

Freon-113,C₂Cl₃F₃,has an enthalpy of vaporization of 27.0 kJ/mol and a normal boiling point of 48.0 ^$\circ$ C.What is the vapor pressure (in atm) of Freon-113 at 22.0 ^$\circ$ C? (R = 8.314 J/K.mol)

Which of the following compounds has a boiling point closest to that of argon?

What intermolecular force or bond is primarily responsible for the solubility of CH₃OH in water?

Which of the following statements concerning intermolecular forces is/are CORRECT? 1) Dipole-dipole attractions occur in all molecules that contain polar bonds,regardless of whether the molecule has a dipole. 2) Induced dipole/induced dipole forces exist in all molecular solids. 3) Hydrogen bonding only occurs in all molecules containing OH bonds.

List all the intermolecular forces present in pure acetone.

Sulfur dioxide has a vapor pressure of 462.7 mm Hg at -21.0 ^$\circ$ C and a vapor pressure of 140.5 mm Hg at -44.0 ^$\circ$ C.What is the enthalpy of vaporization of sulfur dioxide? (R = 8.314 J/K.mol)