A graph between the amount of gas adsorbed per gram of the absorbent and equilibrium pressure of the adsorbate at constant temperature is called ............ .

The curve showing the variation of adsorption with pressure at constant temperature is called

What is the relation between pressure P and density rho of a gas at constant temperature?

What is the nature of graph between pressure P and volume V for a gas at constant temperature?

Justify the statement that volume of a gas at constant pressure decreases if its temperature is decreased.

In 1916 Langmuir proposed theory of adsorption of a gas on the surface of the solid to be made up of elementary sites each of which would adsorb one gas. It is assumed that all adsorption sites are equivalent and the ability of a gas molecule to get bound to any one site is independent whether or not the neighbouring sites are occupied. Additionally, it is also assumed that dynamic equilibrium exists between adsorbed and non adsorbed gas molecule. Following principles can be obtained from Langmuir adsorption isotherm The gas adsorbed behaves ideally in a vapour phase . Only monolayer adsorption fakes place . The surface of the solid is homogeneous . There are no lateral interactive force between the adsorbate molecule . The adsorbed gas molecules are localized . Which type of equilibrium exists between adsorbed and non adsorbed gas molecule.