# A CLOSER LOOK AT GASES.

## Presentation on theme: "A CLOSER LOOK AT GASES."— Presentation transcript:

A CLOSER LOOK AT GASES

What is Gas Pressure? What keeps a balloon inflated? The pressure that is exerted by the gas particles on the sides of the balloon.

What is Gas Pressure? Gas particles collide with each other and also hit inside walls of the container. . Pressure is the amount of force exerted by the gas particles on a given surface.

Can all gases exert a pressure?
Yes!!!

The gas pressure depends on…
Temperature of the gas Volume of the gas

How does the temperature affect the gas pressure?

How does the temperature affect the gas pressure?
When you heat a gas in a closed container, its pressure ………….…. increases

How does the volume affect the gas pressure?
If volume is decreased, the particles will be in a smaller place. So, they hit the walls………………..So, the gas pressure ……………… more often increases

How does the volume affect the gas pressure?

Can all gases be compressed?
Yes!!!

Why can all gases be compressed?
Because of having TOO MUCH SPACE between the particles.

If you compress a gas too much, then what happens?
Gas turns into the liquid because of having the particles too close to each other.

Are solids and liquids compressible?
No!! ! Because, The particles in solids and liquids are already very close to each other.

The rate of diffusion of gases
The particles of bromine diffuse through the air. Diffusion of gases is an evidence for the movement of particles.

The rate of diffusion of gases
Do all the gases diffuse at the same rate?

The rate of diffusion of gases depends on …
Moecular mass of gas molecules.

How does the molecular mass affect the rate of diffusion for gases?
Click HERE to watch the VIDEO. What end the ring is closer to? - HCl end.

Why did the white ring form closer to the HCl end?
HCl and NH3 diffuse from opposite ends of tube. Gases meet to form NH4Cl (the white ring) HCl heavier than NH3 Therefore, NH4Cl forms closer to HCl end of tube. NH4Cl, the white ring

How does the molecular mass affect the rate of diffusion of gases?
The lower the molecular mass of gas particles, the faster the gas will diffuse.