Gas Laws Postulates

A balloon has 15.0g of O₂ at 27.0 °C and 1.54 atm. What is the volume?

• .0675 L

• 7.50 L

• 15.0 L

• 240 L

A gas has a volume of 480 ml at 90.0 mmHg pressure. What pressure is needed to change the volume of the gas to 320 ml?

• 60.0 mmHg
• 80.0 mmHg
• 100 mmHg
• 135 mmHg

Which graph shows the pressure-temperature relationship expected for an ideal gas?

• 1

• 2

• 3

• 4

The solubility of gases in liquids can be decreased best by using-

• lower temperature and pressure

• lower temperature and higher pressure

• higher temperature and pressure

• higher temperature and lower pressure

A change in pressure would have the greatest effect on the solubility of a

• solid in a liquid

• gas in a liquid

• liquid in a liquid

• liquid in a solid

A sample of gas is contained in a closed container under 2 atm of pressure. According to kinetic molecular theory, what causes this pressure?

• The gas molecules are colliding with the walls of the container, exerting a force on the container.

• The gas molecules are colliding with each other, exerting a force on each other.

• The gas particles are chemically reacting with each other releasing energy.

• The gas molecules are attaching to the walls of the container, pulling it inward.

Tags

NGSS.HS-PS3-2

Which of the following is not one of the postulates of the Kinetic Molecular Theory for ideal gases?

• The collisions between particles are elastic.

• The particles attract and then repel each other

• The particle size is very small compared to the space between the particles.

• The particles are in constant random motion.

Tags

NGSS.HS-PS3-4

Two gas molecules collide together in a box container. Which reaction accurately portrays the kinetic molecular theory?

• The two molecules will stay together because they are attracted to each other.

• The two molecules will move off in opposite directions because they are repelled by each other.

• The two molecules will move in different directions without being attracted or repelled by the other.

• The two molecules will either be attracted or repelled by each other depending on the charge of each gas molecule.

Tags

NGSS.HS-PS2-1

Gases N,O, and P, in a closed system at constant temperature, have a total pressure of 1920 mmHg. The partial pressure of each gas is shown on the table.

The partial pressure of gas O, in torr, is equal to:

• 1920 - (A+C)

• (B+C) - 1920

• (B+C) / 1920

• 1920 / (B+C)

1000mL of gas is cooled from 100°C to 1°C. What is the new volume?

• 10mL
• 100mL
• 1mL
• 100000mL