Gas Pressure and Temperature (H)

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

• The pressure will increase

• The pressure will decrease

• The pressure will remain constant

• The pressure will equalize

Tags

NGSS.HS-PS3-4

Pressure is

• defined as the mass that an object exerts when at rest.

• not a measurable in gases.

• defined as the number of moles of substance divided by the mass of the substance.

• created by the force of the gas particles impacting the walls of the container.

A student inflates a balloon with helium then places it in the freezer. The student should expect

• the balloon's volume to increase

• the balloon's volume to decrease

• the number of particles to increase

Gases __________.

• have a fixed shape

• are easily compressed

• have particles that do not flow easily

• vibrate about a fixed point

Kinetic energy =

• $\frac{F}{A}$

• $\frac{1}{2}mv^2$

• $mgh$

• $\frac{m}{V}$

In the graph, air pressure is on the Y axis and altitude increases to the right on the X axis. What statement below best describes the graph?

• pressure increases as altitude increase

• pressure decreases as altitude increases

• pressure decreases as altitude decreases

• atmospheric pressure is zero at sea level.

What is Brownian motion?

• The random movement of particles in a liquid or gas

• The colour of atoms when viewed with a microscope

• The movement of solid molecules

• The pressure exerted on a container

Pollen grains suspended in water exhibit Brownian motion. How does a particle undergoing Brownian motion move?

• In smooth curves

• Randomly

• Orderly with a pattern

• In straight lines with no change of direction

Which of the following does NOT describe Brownian motion?

• 
• 
• 
• 

Which of these is under greater pressure?

• 
•