Gases with Examples

Gases with Examples

Gas is one of the phases of matter. Distances between atoms or molecules in gas phase are larger than solids and liquids. Because of this reason, we can compress gases. Gases do not have specific volumes, they fill the container. Gases also have property of diffusing. We will explain four basic concepts helping us in examining gases, moles, volume, temperature and pressure. Picture given below show differences between structures of solid, liquid and gas.











Mole (n)

In last unit we learn mole concept. 1 mole gas contains 6,02x1023 atoms or molecules. For example, 16 g O and 16 g N has different volumes, on the contrary 16 g O and 14 g N  has same volume since their number of atoms and moles are equal. We use following formulas to find mole of gas.


where; n is number of mole, m is mass, M is molar mass of element or compound.



where, n is number of mole, N is number of atoms or molecules, NA is Avogadro's Number.

Volume (V)

Volume of gas is equal to volume of container. They have no specific volumes. Under standard temperature and pressure 1 mole gas has 22,4 liters volume. Units of volume we use here is liter.

Temperature (T)

In calculations of gases absolute temperature (K) is used. In -273, diffusion of gases is zero and in nature Kelvin is the unit of temperature and relation between K and 0C is;


Example: Find value of 1200C in terms of Kelvin.

T=120+273=393 K

Example: Find value of 300 K in terms of 0C.



t=27 0C


Pressure is the force acting perpendicularly on unit surface. Unit of pressure is mm Hg, cm Hg or atm. In general, (atmospheric pressure) atm is used. Reason of the gas pressure is motion and collision of gas particles on surfaces. In measuring gas pressure, there are two methods we should learn, measuring pressure of gas and atmospheric pressure. Picture given below shows a method for measuring atmospheric pressure.

atmospheric pressure












This setup is a simple barometer that helps us to measure atmospheric pressure. In this system, empty tube is immersed into the tank filled with mercury. After this step some of the mercury rises in the tube at level 76cm. In liquids, pressures are equal at points in same level. Thus, atmospheric pressure on surface of liquid must be balanced by pressure of mercury in the tube. 76 cm shows us, this amount of mercury pressure balance atmospheric pressure. Let P0 is the atmospheric pressure then;
P0=h cm Hg

P0=76 cm Hg at sea level.

h depends on;

density of the liquid put into container

h does not depend on cross section area of tube.


Gases Exams and  Problem Solutions


example of gases that have volume
example of gases
atmospheric pressure
gas pressure barometer form 4
diffusion of gases on different mass
solid, liquid gas molecules
Tutorials on diffusion in gases and liquids
table on properties of solid liquid and gases
example problem in pressure barometer
what is an example of a gas barometer
properties and examples of gasses in chemistry
barometer example chemistry problem
points use barometer of gases chemistry
example of gas in chemistry
diffusion in liquids and gases with example
show that gases have no volume
what are examples of gases
mole concept atmospheric pressure conditions
atoms in molecules temperature
molecules of liquid and gas
gas and atmospheric pressure
molecules in solid liquid and gas
tutorials on liquefied gases
difference atoms in a gas and in a liquid
simple barometer
simple pressure example
chemistry form 4 tutorial
solid liquid gas molecules
difference between solid, liquid and gas
diffusion mass tutorials
difference between of gas,liquid and solid
molecular view solid, liquid, gas
density gas liquid solid molecules
liquids, solids and gases- display resources
differences between solids, liquids and gases
10 sample of liquid molecules pictures
gas pressure barometric mm Hg barometer
atoms of a solid liquid and gas
gas atoms example
phase Pics chemistry for solid liquid and gas
examples of atmospheric pressure of picture
examples of molecules of gas
atoms in solid,liquid gases
what are the examples of gas molecules
examples of solid liquid and gas atoms and elements
particles of solid liquid and gas
atoms in a liquid solid and gas
whats the difference between gases and liquids