Question

How do you figure out the ideal gas equation in a lab experiment?

Answer 1

• The ideal gas law is obtained by combining Boyle's Law, Charle's Law and Avagadro's Law together.

Boyle's Law :

For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional.

Charles's law (also known as the law of volumes) is an experimental gas law which describes how gases tend to expand when heated. A modern statement of Charles's law is. When the pressure on a sample of a dry gas is held constant, the Kelvin temperature and the volume will be directly related.

Avogadro's law states that, "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules".

By combining the above equation, we will get the ideal gas law.

PV = nRT

P-> pressure

V-> Volume

n-> no. of moles

R-> universal gas constant

T-> temperature.

• We use Ideal gas for our simplicity,as the calculation is very easy there is no gas which is ideal( but most of the gases behave ideally at low pressure and high temperature)
• By using ideal gas we mainly get the approximate result, but its almost close to the actual one, so we mainly use this law.

A LAB experiment is given below :

• Introduction