Exam 2 Review

Select all the following that are true about the properties of Gases:

• Compressible

• Low Density

• Expand to fill a container

• Form homogenous mixtures

Answer explanation

Chapter 10.1 Properties of Gases

- Properties of a gas are almost independent of its identity.

- Gas molecules behave as if no other molecules are present.

Properties:

- Compressible

-Low density

-Expand to fill container

-Form Homogenous mixtures.

Select all the following that are included in Gas Laws:

• Volume (V)

• Pressure (P)

• Temperature (T)

• Amount of a gas - moles (n)

Answer explanation

Chapter 10.2 The Gas Laws

- Gas laws- empirical relationships among gas parameters.

- Volume (V)

- Pressure (P)

- Temperature (T)

- Amount of a gas (n)

What is Boyle's Law?

• Pressure-Volume relationship at constant temperature

  (P1V1 = P2V2)

• Temperature - volume relationship at constant pressure

  (V1/T1 = V2/T2)

• Pressure-Temperature relationship at constant moles

  P1T1 = P2T2)

• Volume of a gas sample is directly proportional to the number of moles

  (V1/n1 = V2/n2)

Answer explanation

Chapter 10.2

Boyles Law: pressure-volume relationship at constant temperature

P1V1 = P2V2

True or False: Boyle's law is an indirect relationship

Answer explanation

Which of the following describes Charles' and Guy Lussac's law?

• Temperature-volume relationship at constant pressure

  V1/T1 = V2/T2

• Pressure-volume relationship at constant temperature

  P1V1 = P2V2

• The volume of a gas sample is directly proportional to the number of moles in the sample

  V1/n1 = V2/n2

• The pressure of a sample is proportional to the volume of the container.

  P1/V1 = P2/V2

Answer explanation

Chapter 10.2 Charles' and Guy-Lussac's Law:

Temperature-volume relationship at constant pressure

V1/T1 = V2/T2

True or False: Charles' and Guy Lussac's is a direct relationship

Answer explanation

What is the combined gas law?

• P1V1/n1T1 = P2V2/n2T2

• P1T1/n1V1 = P2T2/n2V2

• P1V1 = P2V2

• V1/T1 = V2/T2

Answer explanation

What is the ideal gas law?

• PV = nRT

• PT = nVR

• Pn = VRT

• P = VnRT

Answer explanation

What is STP? Standard Temperature and Pressure

• 1 atm, 0 celcius or 273.15 K

• 1 atm

• 273K

• 100 C

Answer explanation

Standard Temperature and Pressure is 1 atm at 0 degree Celsius or 273.15 K

Select all the following statements that are true of Kinetic Molecular Theory?

• A gas is composed of particles that are separated by relatively large distances.  The volume occupied by individual molecules is negligible.

• Gas molecules are constantly in random motion, moving in straight paths, colliding with the walls of their container and with one another in perfectly elastic collisions.

• Gas particles exert no attractive or repulsive forces on one another.

• The average kinetic energy of the particles is proportional to the absolute temperature.

Answer explanation

10.6 The Kinetic Molecular Theory

All postulates are true.