Positive adsorption: In case of adsorption by solids from the solutions, mostly the solute is adsorbed on the surface of the solid adsorbent so that the concentration of solute on the surface of the adsorbent is greater than in the bulk. This is known as positive ...

Difference between physical adsorption and chemisorption are as following: PHYSICAL ADSORPTION CHEMISORPTIONS The forces operating in these are weak     vander Waal’s forces. The forces operating in these cases are similar to those of a chemical bond. The heat of adsorption are low i.e. about 20 – ...

Adsorption: The phenomenon of attracting and retaining the molecules of a substance on the surface of a liquid or a solid resulting into a higher concentration of the molecules on the surface is called adsorption. The substance thus adsorbed on the surface is called the adsorbate ...

For the homogeneous gaseous reaction 2 AB2 (g) ⇌ 2 AB (g) + B2 (g) Derive an expression for the degree of dissociation, α, in terms of Kp and total pressure P assuming that α

PCl5 dissociates as: PCl5 ⇌ PCl3 Cl2 If α is the degree of dissociation at certain temperature under atmospheric pressure, then Initial concentration: PCl5 = 1 PCl3 = 0 Cl2 = 0 At Equilibrium: PCl5 = 1 - α PCl3 = α Cl2 = α Total number of moles at equilibrium = 1 – α + ...

Relation between Kp and Kc is given as: Kp = Kc (RT) ∆n Kc = Kp / (RT) ∆n T = 700 K R = 8.314 J mol -1 K-1 ∆n = (2 + 1) – 2 = 1 Kp = 1.8 X 10-3 kPa ...

The Equilibrium constant expression involves the concentrations or partial pressures of the reactants and products. The units of Equilibrium constant K will depend on the number of moles of reactants and products. There are following two cases: Case1. When the total number of moles of products is ...

Effect of addition of inert gas like helium, neon etc has the following effects on the equilibrium constant: There are two cases on which equilibrium depends. These are: (1) Addition of an inert gas at constant volume: When an inert gas is added to the system in equilibrium ...