Exam 11: Liquids, Solids, and Intermolecular Forces

A metal crystallizes in a face-centred cubic structure and has a density of 11.9 g cm^-3. If the radius of the metal atom is 138 pm, what is the identity of the metal?

What is the strongest type of intermolecular force present in H₂?

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

The fluorocarbon C₂Cl₃F₃ has a normal boiling point of 47.6 °C. The specific heats of C₂Cl₃F₃(l)and C₂Cl₃F₃(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 5.0 °C to the gas at 80.0 °C is ________ kJ.

Which of the following statements is TRUE?

Identify the compound with the highest boiling point.

How much energy is required to vaporize 48.7 g of dichloromethane (CH₂Cl₂)at its boiling point if its Δ_vapH is 31.6 kJ mol^-1?

Which of the following substances should have the highest melting point?

Identify the characteristics of a liquid.

Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force.

The forces between polar molecules is known as ________.

Determine the normal boiling point of a substance whose vapour pressure is 73.46 mbar at 35 °C and has a Δ_vapH of 32.1 kJ mol^-1.

How much energy is required to heat 36.0 g H₂O from a liquid at 65 °C to a gas at 115 °C? The following physical data may be useful: Δ_vapH = 40.7 kJ mol^-1 C_liq = 4.18 J g^-1 °C^-1 C_gas = 2.01 J g^-1 °C^-1 C_sol = 2.09 J g^-1 °C^-1 T_melting = 0 ^∘C T_boiling = 100 ^∘C

Choose the substance with the lowest boiling point.

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

Cesium has a radius of 272 pm and crystallizes in a body-centred cubic structure. What is the edge length of the unit cell?

Which of the following forms a molecular solid?

The normal boiling point for H₂Se is higher than the normal boiling point for H₂S. This can be explained by

What is the strongest type of intermolecular force present in NH₂CH₃?

Which one of the following has a low density?