GASES

Which diagram shown above is the best representation of particle pressure?

• a

• b

• c

• d

• e

Tags

NGSS.HS-PS1-3

Gas pressure is exerted

• downwards due to gravity

• upwards because gases are less dense

• in all directions because they have lots of energy

• it depends on the gas

All gases at the same temperature and pressure have the same volume.

• true

• false

A sample of A. nitrogen gas, B. oxygen gas and C. helium are all shown in the flasks above at 0^oC. Which gas will have the greatest average kinetic energy?

• A. nitrogen

• B. oxygen

• C. helium

• D. all are the same

Tags

NGSS.HS-PS3-2

Which sample of the following gases will be least dense?

• helium at 100 K

• nitrogen at 200 K

• nitrogen at 400 K

• hydrogen at -100^oC

Tags

NGSS.HS-PS3-2

The diagrams show above represent a cup filled with water and a cardboard underneath. Which diagram is the correct representation of forces acting on the cardboard?

• a, because it shows air pressure in all directions and water in the cup

• b because it shows how the pressure of gravity is down and the pressure of the air is up

• c because it shows air pressure in all directions

• d because it shows water in the cup and the air pressure holding in the cardboard from below

Tags

NGSS.HS-PS2-2

The diagram shown above shows that the external pressure is _______________________ than the internal pressure so the egg should _________________ the flask.

• less than, be pushed in

• greater than, be pushed in

• less than, be pushed out

• greater than, be pushed out

All flasks are at the same temperature and have the same volume. Which of the flasks shown above has the greatest pressure and why?

• flask A because it has the least number of particles

• flask B because it has more particles than A that move faster.

• flask C because it has the most particles

• It is not possible to determine from the information given.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the diagrams above will have greater pressure?

• the left because it is a larger container with 12 particles

• the left because it is a smaller container with 12 particles

• the right because it is a larger container with 12 particles

• the right because it is a smaller container with 12 particles

Tags

NGSS.HS-PS1-3

Gas molecules can be easily compressed because

• gas particles are soft

• gas particles follow the shape of the container

• gas particles are far apart

• gas particles flow