Ideal Gas Equation
An ideal gas is a theoretical gas and is not present practically. It is said to have collisions among the particles and these collisions are perfectly elastic. The ideal gas equation is used to prove the existence of Ideal gases and find out more about their properties. It is derived by using Boyle’s law and Charles’s law.
By Boyle’s law, at constant temperature for a fixed number of moles, the volume of the gas is inversely proportional to the pressure of the gas.
v ∝ 1/p
By Charles’s law, at constant pressure for a fixed number of moles, the volume of the gas is directly proportional to the temperature of the gas.
v ∝ T
By Avogadro’s law, at constant pressure and temperature, the volume of the gas is directly proportional to the number of moles.
v ∝ n
If we combine all the above equations we get:
v ∝ nT/P
PV = nRT
Thus, the Ideal gas Equation is
PV = nRT
where,
P is the pressure on the Gas.
V is the Volume of the Gas
n is the number of moles present in the Gas.
R is the Universal Gas Constant
T is the temperature of the Gas
How to Calculate the Molar Mass of a Gas?
Molar Mass can be defined as the mass of a sample divided by the number of moles present in the substance. We know that all the particles present in this world are made of smaller molecules known as molecules or atoms. Due to the extremely small size of these particles, it is very difficult to measure the weight of these particles. So for this reason the molar mass of a molecule is considered when it is required.