Gas practice

which statement describes the particles of an ideal gas, based on

the kinetic molecular theory?

• The force of attraction between the particles is strong.

• The volume of the particles is considered negligible.

• The particles are closely packed in a regular, repeating pattern.

• The particles are separated by small distances, relative to their size.

Which phrase describes the motion and attractive forces of ideal gas particles?

• random straight-line motion and no attractive forces

• random straight-line motion and strong attractive forces

• random curved-line motion and no attractive forces

• random curved-line motion and strong attractive forces

Under which conditions of pressure and temperature is a real gas most like an ideal gas?

• low pressure and low temperature

• low pressure and high temperature

• high pressure and low temperature

• high pressure and high temperature

Under which conditions of temperature and pressure does a sample of propane behave least like an ideal gas?

• 250. K and 1.0 atm

• 250. K and 5.0 atm

• 500. K and 1.0 atm

• 500. K and 5.0 atm

A real gas differs from an ideal gas because the molecules of real gas have

• some volume and no attraction for each other

• no volume and some attraction for each other

• no volume and no attraction for each other

• some volume and some attraction for each other

At the same temperature and pressure, 1.0 liter of CO(g) and 1.0 liter of CO₂(g) have (Avogadros law)

• equal masses and the same number of molecules

• different masses and a different number of molecules

• equal volumes and the same number of molecules

• different volumes and a different number of molecules

During which phase change does the entropy of a sample of H₂O increase?

• H₂O(g) H₂O(l)

• H₂O(g) H₂O(s)

• H₂O(l) H₂O(g)

• H₂O(l) H₂O(s)

As the temperature of a given sample of a gas decreases at constant pressure, the volume of the gas

• decreases

• increases

• remains the same

As the pressure of a gas decreases at constant volume,

the temperature will

• remain the same

• decreases

• increases

The initial volume of a balloon is 10 ml. When the pressure increases from

1.0 atm to 2.0atm the new volume will be

• 30 ml

• 5 ml

• 20 ml

• 15 ml