Exam 12: Intermolecular Attractions and the Properties of Liquids and Solids

A substance has a normal boiling point of +89.3 °C, an enthalpy of vaporization of 2600 J g^-1, and specific heats for the liquid and the gas are 6.20 and 3.20 J g^-1 °C ^-1, respectively. How much energy is needed to change 150 grams of the substance from a liquid at -10.0 °C to a gas at +129.0 °C?

The following questions refer to the phase diagram below. Gas, liquid, and solid phases are all present, but not labeled. -At the temperature and pressure of point e, which statement below is true?

Keshon has an equation that gives the relationship between the air pressure at sea level, p₀, and the air pressure, p, at a height, h (in meters), above sea level:h = 4405 ln He found a value for ΔΗ_vap of water, 41,108 J mol^-1. Keshon has now challenged two other whiz kids in the class with this problem: Their weather app has given the barometric pressure at sea level as 30.18 inches of mercury. What is the temperature of the boiling water in a teapot at a mountain camp which is 2200 meters (about 7220 feet)above sea level?Hint: Use the Clausius-Clapeyron equation and pay attention to units.

Determine the shift in equilibrium that would result if 100 kJ of energy were added to ice melting at 0°C to form water (H₂O(s)⇆ H₂O(l)).

How many atoms are contained in one unit cell of metallic polonium, if it forms a simple cubic unit cell?

X-ray radiation at a wavelength of 1.542 × 10^-10 m is used to irradiate a metallic crystal. The X-rays are being reflected at an angle of 12.73°. If this reflection is a first order reflection(n = 1), what is the distance between the planes of atoms in this metallic crystal?

A new compound, voronium oxide, has been discovered. X-ray crystallographic studies reveal that it has a cubic unit cell with a voronium ion at each of the corner lattice points and an oxide ion in the geometric center of the unit cell. Based on this structure, the formula for the compound should be

Given the following substances and their normal boiling points, in °C: Which ranking correctly lists some of these liquids in order of decreasing intermolecular forces at 20°C?

All substances have London forces.

Which one of the following substances is most likely composed of ions rather than distinct formula units, when it is in the solid state?

Arrange these compounds in order of increasing vapor pressure at 20°C: CCl₄, GeCl₄, SiCl₄, SnCl_4.

Given the following substances and their normal boiling points, in °C: Which ranking correctly lists some of these substances in order of increasing vapor pressure at 20°C?

At 1.0 atm pressure, ice (solid H₂O)floats in water instead of sinking. The reason for this is

An unknown solid is soft and lustrous. It has a low melting point and conducts electricity well as a solid or liquid. What kind of crystal best describes this solid?

The following questions refer to the phase diagram below. -Which of the following values of temperature and pressure most closely correspond to the triple point of this substance?

Which covalent compound will exhibit hydrogen bonding in the liquid state?

Solid carbon dioxide never forms a liquid at a pressure of one atmosphere, instead, it sublimes when left open to the atmosphere. Why?

The following questions refer to the diagram below. -How does the boiling point of this substance vary as the pressure on this substance increases?

Which of the following liquids, at the same temperature, has the highest vapor pressure?

In a one-element solid with a simple cubic crystal structure, how many atoms are in one unit cell?