MolSynapsequestion bank

MolSynapse / Question bank / Surface Chemistry / Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms

JEE Main levelNumerical answerDifficulty 2 of 3sc028

Charcoal adsorbs a gas with monolayer capacity $7.2 c m^{3} g^{- 1}$ (at STP) and Langmuir constant $K = 0.25 kP a^{- 1}$ . At $p = 6.0 kPa$ , what volume of gas (in $c m^{3}$ at STP, nearest integer) is adsorbed by $25 g$ of charcoal?

Numerical answer type, answer in cm^3, tolerance 1.

Answer: 108 cm^3

K p = 0.25 \times 6.0 = 1.5

, so

θ = 1.5/2.5 = 0.60

. Volume per gram

= 0.60 \times 7.2 = 4.32 c m^{3}

. For

25 g

:

4.32 \times 25 = 108 c m^{3}

.

Practice Surface Chemistry More on Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms

Previous questionNext question

More questions on Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms