In effusion, we take an assumption that there is a vacuum on the other side of the separating membrane and no resistance occurs to the flow of gas through the fine hole.Then how is free expansion different?Also, is there any difference w.r.t temperature change accompanying free expansion and effusion?

Dear Siddhant,

Free expansion and effusion are related. Effusion occurs even during free expansion.
But when we say free expansion, we see the thermodynamin aspect of the process while in effusion, rates etc are compared.
Free expansion will occur when gas is left in a insulated evacuated chamber and for effusion, some pressure difference is required.

Best Of luck

Cracking IIT just got more exciting,It s not just all about getting assistance from IITians, alongside Target Achievement and Rewards play an important role. ASKIITIANS has it all for you, wherein you get assistance only from IITians for your preparation and win by answering queries in the discussion forums. Reward points 5 + 15 for all those who upload their pic and download the ASKIITIANS Toolbar, just a simple  to download the toolbar….

So start the brain storming…. become a leader with Elite Expert League ASKIITIANS

Thanks

Aman Bansal

Askiitian Expert