0

Guest

Courses New

Define absorption. write any two features which distinguish physisorption from chemisorption.

Define absorption. write any two features which distinguish physisorption from chemisorption.

Grade:Upto college level

1 Answers

Gaurav
askIITians Faculty 164 Points
9 years ago
Absorption is the process in which liquid or gas molecules enter bulk of a solid.

Physisorption

  • Only van der Waals force are present between adsorbate and surface of adsorbent

  • Low enthalpy of adsorption ie, in the order of 20 kjmol-1.
  • ​It is usually takes place atlow temperatureand does not require any activation energy.


Chemisorption

  • Chemical bonds are formed between adsorbate and surface of adsorbent

  • High enthalpy of adsorption i.e,order of 200 kjmol-1.

  • It takes place athigh temperatureand require activation energy..

Think You Can Provide A Better Answer ?

Other Related Questions on Physical Chemistry

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More