
Derivation of kinetic gas equation
Consider a certain mass of gas enclosed in a cubic box at a fixed temperature. Suppose that: the length of each side of the box = cm the total number of…

Kinetic Molecular Theory
Maxwell and Boltzmann (1859) developed a mathematical theory to explain the behaviour ofgases and the gas laws. It is based on the fundamental concept that a gas is made of a large numberof molecules in perpetual motion. Hence the theory is called the kinetic molecular theory or simplythe kinetic theory of gases (The word kinetic…

Ideal gas law
As we studied in: Boyle’s Law: V∝ Charle’s Law: V∝ T Avogadro’s Law: V ∝ n by combining the three laws: V ∝ The ideal gas law: It is law which is applied to all gases that exhibit ideal behaviour and obey the gas laws perfectly. It states that: the volume of a given amount of…

Dalton’s law of partial pressure
John Dalton visualised that in a mixture of gases, each component gas exerted a pressure as if it were alone in the container. The pressure of each gas in mixture is called partial pressure. Dalton’s law of partial pressure: It states that : the total pressure of a mixture of gases is equal to the…

Graham’s diffusion law
Lighter molecules move faster than the heavier one. According to this concept Graham’s could reach his law ,but at first we should to differentiate between to terms Diffusion and Effusion). Diffusion: process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a…

Combined gas law
As we talked previously Charle’s law and Boyle’s law. Charle’s law: Boyle’s law: Therefore: The combined law can be stated as: for a fixed mass of gas, the volume is directly proportionalto kelvin temperature and inversely proportional to the pressure. The combined law: If the pressure, volume or temperature is changed from then:

Gay Lussac’s Law (Pressure – temp. law)
It is called pressure law. It is the same of charle’s but, instead of relation between volume and temperature it becomes between pressure and temperature at constant volume this time. It states that: at constant volume, the pressure of a fixed mass of gas is directly proportionalto the Kelvin temperature or absolute temperature. P∝ T…

Boyle’s Law
Boyle’s law states that at constant Temperature, the volume of a fixed mass of gas is inversly proportional to the pressure. V∝ (at const. T) V: Volume, T: Temperature, P: pressure V = k (k is constant) PV = const. so we can conclude that the if we changed the pressure of gas…

Carle’s Law
Charle’s law states that at constant pressure, the volume of a fixed mass of gas is directly proportional to the Kelvin temperature of absolute temperature. V∝ T (at const. P) V: Volume, T: Temperature, P: pressure V = k T (k is constant) so we can conclude that the if we changed the…