Ch10 Properties Of Gases Flashcards
Gas
A substance that has no well-defined boundaries, but diffuses rapidly to fill any container in which it is placed
3states of matter
Solid gas liquid
Solids
Size and shape of its own
Can be held
Very tightly packed together
Liquids
Has a size but no shape of its own
Takes shape of the container it is in
Particles are loosely connected
Gases
No shape or size of its own whatsoever
Particles are hardly linked at all and they collide with each other frequently
How do gases spread
Spread throughout their containers by diffusion
- particles of liquid also diffuse but not as quickly
Do gases have a fixed volume
Gases do not have a fixed volume
-they can be compressed and expanded, volume depends on temperature and pressure
Temperature
Measure of the degree of hotness of an object
Converts Celsius to kelvin
By adding 273K
0 c is 273 k
Pressure
The pressure of a gas is the force that the gas exerts on each unit area of its container
Is units for at,spherical pressure
Nm-2
Pascal Pa
1hPa
1kPa
1hPa = 100Pa
1kPa =1,000 Pa
Normal atmospheric pressure
1x10^5
Volume
Of a gas is the same as the volume of its container
So units for volume
m^3,
Others - L, dm^3, cm^3
How many cm cubed in 1mcubed
1 million.
Multiply by 10^-6
S.T.P
Standard temperature and pressure
Standard temp
273 K
0degrees celsius
Standard pressure
1x10^5 Pa
100kPa
Boyles law
At a constant temperature, the volume of a fixed mass of any gas is inversely proportional to the pressure of the gas
Boyles law
At a constant temperature, the volume of a fixed mass of any gas is inversely proportional to the pressure of the gas
Charles law
At a constant pressure, the volume of a fixed mass of any gas is directly proportional to the Kelvin temperature
