How much enthalpy is necessary to heat 10.0 g of solid benzene (C6H6) at 0.0$\circ$C to benzene vapor at 100$\circ$C $~~~~~~~~~~~~~~~~~~~~~\text { Data for Benzene }$ $\begin{array}{|l|l|} \hline \text { melting point } & 5.5^{\circ} \mathrm{C} \\ \hline \text { boiling point } & 80.1^{\circ} \mathrm{C} \\ \hline \text { specific heat of solid benzene } & 1.52 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \\ \hline \text { specific heat of liquid benzene } & 1.73 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \\ \hline \text { specific heat of benzene vapor } & 1.06 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \\ \hline \Delta \mathrm{H}_{\text {fus }} & 9.9 \mathrm{~kJ} / \mathrm{mol} \\ \hline \Delta \mathrm{H}_{\text {vap }} & 30.8 \mathrm{~kJ} / \mathrm{mol} \\ \hline \end{array}$

A) 6.8 kJ B) 6.0 kJ C) 5.2 kJ D) 4.4 kJ E) None of the above A) 6.8 kJ B) 6.0 kJ C) 5.2 kJ D) 4.4 kJ E) None of the above

Exam 11: Intermolecular Forces and Liquids and Solids

The intermolecular forces present in CH₃NH₂ include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

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Question 1

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Indicate all the types of intermolecular forces of attraction in CHCl₃(l).

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Question 2

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Which type of intermolecular force is the strongest (ionic, ion-dipole, dipole-dipole, hydrogen bonding, dispersion)

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Question 3

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Which two properties are more typical of molecular compounds than of ionic compounds 1. They are gases or liquids at room temperature. 2. They have high melting points. 3. Solids do not conduct electricity, but liquids do. 4. Atoms share electrons.

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Question 4

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure. The edge length of this cubic unit cell is 540.9 pm. Determine the density of zincblende.

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Question 5

Which of the following properties is not influenced by hydrogen bonding

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Question 6

Polyethylene plastic consists of long chains of carbon atoms, each of which is also bonded to hydrogens as shown below: Water forms beads when placed on a polyethylene surface. Why

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Question 7

Arrange the following in order of increasing melting point: NaCl, H₂O, CH₄, C₆H₄(OH)₂.

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Question 8

Indicate all the types of intermolecular forces of attraction in He(l).

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Question 9

The molar enthalpy of vaporization of hexane (C₆H₁₄) is 28.9 kJ/mol, and its normal boiling point is 68.73^$\circ$C. What is the vapor pressure of hexane at 25^$\circ$C

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Question 10

Given that the heat of vaporization of mercury is 59.0 kJ/mol and the vapor pressure of mercury is 0.0017 torr at 25^$\circ$C, calculate the normal boiling point of mercury.

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Question 11

Which one of the following substances should exhibit hydrogen bonding in the liquid state

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Question 12

The atomic planes in a graphite crystal are separated by 335 pm. At what angle would you find the first-order (n = 1) diffraction of 0.154 nm X-rays from a graphite crystal

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Question 13

How much enthalpy is necessary to heat 10.0 g of solid benzene (C₆H₆) at 0.0^$\circ$C to benzene vapor at 100^$\circ$C $~~~~~~~~~~~~~~~~~~~~~\text { Data for Benzene }$ melting point 5. boiling point 80. specific heat of solid benzene 1.52/\cdot specific heat of liquid benzene 1.73/\cdot specific heat of benzene vapor 1.06/\cdot \Delta 9.9/ \Delta 30.8/

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Question 14

Crystals of elemental sulfur are easily crushed, and melt at 113^$\circ$C. Liquid sulfur does not conduct electricity. What kind of crystal is this

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Question 15

The intermolecular forces present in HSCH₂CH₂SH include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

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Question 16

Magnesium oxide, MgO, melts at 2,800^$\circ$C and is very hard. The liquid conducts electricity very well. What kind of crystal is this

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Question 17

Which one of the following is an example of a covalent network solid

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Question 18

Each of the following substances is a gas at 25^$\circ$C and 1 atmosphere pressure. Which one will liquefy most easily when compressed at a constant temperature

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Question 19

Potassium bromide, KBr, crystallizes like NaCl in a face-centered lattice. The ionic radii of K⁺ and Br^- ions are 133 pm and 195 pm, respectively. Assuming that all Br^- ions are positioned in the face and corners of the unit cell, while the K⁺ ions are positioned along the edge alternating between anions, calculate the length of a unit cell edge.

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Question 20

Showing 1 - 20 of 149

Exam 11: Intermolecular Forces and Liquids and Solids

The intermolecular forces present in CH3NH2 include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

Indicate all the types of intermolecular forces of attraction in CHCl3(l).

Which type of intermolecular force is the strongest (ionic, ion-dipole, dipole-dipole, hydrogen bonding, dispersion)

Which two properties are more typical of molecular compounds than of ionic compounds 1. They are gases or liquids at room temperature. 2. They have high melting points. 3. Solids do not conduct electricity, but liquids do. 4. Atoms share electrons.

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure. The edge length of this cubic unit cell is 540.9 pm. Determine the density of zincblende.

Which of the following properties is not influenced by hydrogen bonding

Polyethylene plastic consists of long chains of carbon atoms, each of which is also bonded to hydrogens as shown below: Water forms beads when placed on a polyethylene surface. Why

Arrange the following in order of increasing melting point: NaCl, H2O, CH4, C6H4(OH)2.

Indicate all the types of intermolecular forces of attraction in He(l).

The molar enthalpy of vaporization of hexane (C6H14) is 28.9 kJ/mol, and its normal boiling point is 68.73 ∘\circ∘ C. What is the vapor pressure of hexane at 25 ∘\circ∘ C

Given that the heat of vaporization of mercury is 59.0 kJ/mol and the vapor pressure of mercury is 0.0017 torr at 25 ∘\circ∘ C, calculate the normal boiling point of mercury.

Which one of the following substances should exhibit hydrogen bonding in the liquid state

The atomic planes in a graphite crystal are separated by 335 pm. At what angle would you find the first-order (n = 1) diffraction of 0.154 nm X-rays from a graphite crystal

Crystals of elemental sulfur are easily crushed, and melt at 113 ∘\circ∘ C. Liquid sulfur does not conduct electricity. What kind of crystal is this

The intermolecular forces present in HSCH2CH2SH include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

Magnesium oxide, MgO, melts at 2,800 ∘\circ∘ C and is very hard. The liquid conducts electricity very well. What kind of crystal is this

Which one of the following is an example of a covalent network solid

Each of the following substances is a gas at 25 ∘\circ∘ C and 1 atmosphere pressure. Which one will liquefy most easily when compressed at a constant temperature

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The intermolecular forces present in CH₃NH₂ include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

Indicate all the types of intermolecular forces of attraction in CHCl₃(l).

Arrange the following in order of increasing melting point: NaCl, H₂O, CH₄, C₆H₄(OH)₂.

The molar enthalpy of vaporization of hexane (C₆H₁₄) is 28.9 kJ/mol, and its normal boiling point is 68.73^$\circ$C. What is the vapor pressure of hexane at 25^$\circ$C

Given that the heat of vaporization of mercury is 59.0 kJ/mol and the vapor pressure of mercury is 0.0017 torr at 25^$\circ$C, calculate the normal boiling point of mercury.

Crystals of elemental sulfur are easily crushed, and melt at 113^$\circ$C. Liquid sulfur does not conduct electricity. What kind of crystal is this

The intermolecular forces present in HSCH₂CH₂SH include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

Magnesium oxide, MgO, melts at 2,800^$\circ$C and is very hard. The liquid conducts electricity very well. What kind of crystal is this

Each of the following substances is a gas at 25^$\circ$C and 1 atmosphere pressure. Which one will liquefy most easily when compressed at a constant temperature