Gas 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.

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-PS3-2

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.

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