Exam 11: Liquids, solids, and Intermolecular Forces

Vanadium crystallizes in a body-centred cubic structure and has an atomic radius of 131 pm.Determine the density of vanadium if the edge length of a bcc structure is 4r/ $\sqrt{3}$ .

Which of the following compounds exhibits only dispersion and dipole-dipole intermolecular interactions?

Nickel has a face-centred cubic structure and has a density of 8.90 g cm^-3.What is its atomic radius?

Give the term for the temperature at which the gas and liquid phases form a supercritical fluid.

Choose the substance with the highest viscosity in the liquid phase.

Place the following substances in order of increasing boiling point. Ne $\quad$ Cl₂ $\quad$ O₂

Identify triple point.

Gold crystallizes in a face-centred cubic structure.What is the edge length of the unit cell if the atomic radius of gold is 144 pm?

How much energy must be removed from a 94.4 g sample of benzene (molar mass = 78.11 g mol^-1)at 322.0 K to solidify the sample and lower the temperature to 205.0 K? The following physical data may be useful: Δ_vapH = 33.9 kJ mol^-1 Δ_fusH = 9.8 kJ mol^-1 C_liq = 1.73 J g^-1 °C^-1 C_gas = 1.06 J g^-1 °C^-1 C_sol = 1.51 J g^-1 °C^-1 T_melting = 279.0 K T_boiling = 353.0 K

Identify the compound with the highest boiling point.

How much energy is required to heat 87.1 g acetone (molar mass = 58.08 g mol^-1)from a solid at -154.0 °C to a liquid at -42.0°C? The following physical data may be useful: Δ_fusH = 7.27 kJ mol^-1 C_liq = 2.16 J g^-1 °C^-1 C_gas = 1.29 J g^-1 °C^-1 C_sol = 1.65 J g^-1 °C^-1 T_melting = -95.0 °C

Choose the pair of substances that are most likely to form a homogeneous solution.

The fluorocarbon C₂CL₃F₃has a normal boiling point of 47.6 °C.The specific heats of $\mathrm { C } _ { 2 } \mathrm { Cl } _ { 3 } \mathrm {~F} _ { 3 } ( l )$ and $\mathrm { C } _ { 2 }$ $\mathrm { Cl } _ { 3 }$ $\mathrm { F } _ { 3 }$ (g)are 0.91 J g^-1 °C^-1 and 0.67 J g^-1 °C^-1,respectively.The heat of vaporization of the compound is 27.49 kJ mol^-1.The heat required to convert 50.0 g of the compound from the liquid at $4.0 ^ { \circ } \mathrm { C }$ to the gas at 70.0 °C is ________ kJ.

-Based on the figure above,the boiling point of ethyl alcohol under an external pressure of 0.076 bar is ___________ ${ }^{\circ} \mathrm{C}$

Give the coordination number for a body-centred cubic cell.

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g mol^-1)at 425.0 K to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful: Δ_vapH = 33.9 kJ mol^-1 Δ_fusH = 9.8 kJ mol^-1 C_liq = 1.73 J g^-1 °C^-1 C_gas = 1.06 J g^-1 °C^-1 C_sol = 1.51 J g^-1 °C^-1 T_melting = 279.0 K T_boiling = 353.0 K

Identify the type of solid for argon.

The forces between polar molecules is known as ________.

Define deposition.

Why do O,F and N,when bonded to H,form such strong intermolecular attractions to neighbouring molecules? Make sure to be specific.