Adsorption and Absorption

20% of surface sites are occupied by $N_2$molecules. The density of surface sites is $6.023\times {10}^{14}{\mathrm{cm}}^{-2}$ and total surface area is $1000c{m}^2$. The catalyst is heated to 300 K while $N$ is completely desorbed into a pressure of 0.001 atm and volume of $2.46c{m}^3$. The number of active sites occupied by each $N_2$ molecule will be

Adsorption of gases on solid surface is generally exothermic because:

Predict the signs for entropy and enthalpy of adsorption.

What is the effect of surface area on chemical adsorption.

How is physical adsorption affected by surface area?

What kind of bonding is present in chemical adsoprtion?

The enthalpy of chemical adsorption is _____ (lesser/greater) than the enthalpy of physical adsorption.

Why unimolecular layer is formed in chemical adsorption?

How many layers are adsorbed in chemical adsorption?

Pressure has no effect on chemical adsorption.

How long animal charcoal retains its absorbent properties?

Does charcoal purify air?

What is the difference between charcoal and activated charcoal?

Which adsorbent is used in gas mask?

The molecular species or substance, which concentrates or accumulates at the surface is termed adsorbate.

Define adsorbate.

The molecular species or substance, which concentrates or accumulates at the surface is termed _____.

Why chemisorption is not reversible?

Is chemisorption irreversible or endothermic?

Which adsorption is irreversible adsorption?