Exam 7: Gases, Liquids, and Solids

The phrases "particles close together and held in fixed positions" and "completely fills the container" apply, respectively, to

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) Associated with Charles's law is the concept that if the temperature of a gas increases the volume of the gas also increases. (2) Liquids show little change in volume with changes in temperature. (3) Dipole-dipole interactions are examples of intramolecular forces and hydrogen bonds are examples of intermolecular forces.

Consider the mathematical expressions for gas laws listed, select the correct name for the law from the response list:

In the liquid state, disruptive forces are

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) The destructive power of industrial explosives comes from the high-temperature generation of large volumes of gaseous substances. (2) Ideally, the dietary Na⁺/K⁺ ratio should be less than one. (3) Popcorn pops because of the difference in density of liquid and gaseous water.

A gaseous mixture at a total pressure of 1.50 atm contains equal molar amounts of He, Ne, and Ar. At constant temperature CO₂ gas is added to the mixture until the total pressure is 3.00 atm. Which of the following is a correct statement concerning partial pressures after the CO₂ addition?

If some of the vapor is allowed to escape from a sample where liquid and vapor are in equilibrium, the immediate result is

Which of the following statements is correct?

Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) The potential energy of greatest importance when considering the states of matter is that associated with electrostatic interactions between particles. (2) The pressure exerted by each gas in a mixture of gases is the same as it would be if the gas were alone under the same conditions. (3) London forces are instantaneous dipole-dipole interactions whose strength depends on the ease with which molecular electron distributions can be distorted.

Consider the mathematical expressions for gas laws listed, select the correct name for the law from the response list: P₁V₁ = P₂V₂.

In which of the following pairs of physical changes are both changes exothermic?

Which of the following statements about intermolecular forces is incorrect?

Which of the following descriptions apply to matter in the solid state?

Consider the mathematical expressions for gas laws listed, select the correct name for the law from the response list: P₁V₁T₂ = P₂V₂T₁.

Indicate what the missing words are in the following statement of Charles's law: At constant pressure, the volume of a gas sample is _______ proportional to its _______ temperature.

For the following intermolecular force descriptios, select the correct name from the response list: "Permanent" electrostatic interaction between polar molecules in which no hydrogen is present.

For the following intermolecular force descriptios, select the correct name from the response list: "Instantaneous" electrostatic interaction between polar molecules.

For each of the physical state characterizations, select from the response list the physical state or states to which the characterizations apply: cohesive forces dominate over disruptive forces.

What is the volume, in liters, occupied by 2.12 moles of N₂ gas at 0.745 atm pressure and a temperature of 55C?

When the vapor pressure of a liquid equals atmospheric pressure, the temperature of the liquid equals