Unit 8: Properties of Gases

Which example has particles that can be drawn closer to occupy smaller volume?

• block of wood

• fruit juice

• air inside the syringe

• ice cube

Tags

NGSS.MS-PS1-4

Last summer vacation, the Cruz family decided to go to Pagudpod, Ilocos Norte to have a beach party. On their way to Ilocos, all of them were surprised when the tire suddenly exploded. What is the probable explanation for the blown out tire during a long summer drive?

• High temperature causes a decrease in volume.

• The amount of the gases inside the tire is increased.

• The mass of the gases inside the tire increases causing a blown up tire.

• The volume of gases increases as the temperature increases causing a blown up tire.

Tags

NGSS.HS-PS3-4

A pressure of 745 mmHg corresponds to how many atmospheres?

• 0.980

• 0.566

• 1.02

• 2.00

How does the temperature affect the average kinetic energy of gas molecules?

• As the temperature decreases, the average kinetic energy of gas molecules decreases.

• As the temperature decreases, the average kinetic energy of gas molecules increases.

• As the temperature decreases, the average kinetic energy of gas molecules remains the same.

• As the temperature decreases, the average kinetic energy of gas molecules fluctuates.

A hot air balloon rises. Which is the best explanation for this observation?

• the difference in temperature between the air inside and outside the balloon produces convection currents

• the pressure on the walls of the balloon increases with increasing temperature

• the cooler air outside the balloon pushes in on the walls of the balloon

• the density inside the balloon is less than that of surrounding air

Tags

NGSS.MS-PS1-4

In which of the following conditions are the intermolecular forces between gas particles the strongest?

• high pressure

• low temperature

• high volume

• low mass

Which of the following is the SI unit of temperature?

• mmHg

• atmosphere

• Kelvin

• cubic meter

Air is used to inflate a rubber tire. Which of the following best describes the air pressure inside the rubber tire?

• The pressure is uniform on the inside of the rubber tire.

• The pressure is greatest near the bottom and weakest

  on top.

• The pressure is greatest on the sides far from the center

• air inside the rubber tire does not exert gas pressure.

The relationship between pressure and volume of gas can be best described as .

• inverse proportionality

• direct proportionality

• direct squared proportionality

• constant proportionality

In which of the following setups can the Boyle's law apply?

• helium in a balloon

• oxygen in the lungs

• water in a pitcher

• sand in an hourglass