Home » Ask & Discuss » Chemistry. » Physical Chemistry « Back to Discussion

Physical Chemistry

New kid on the Block

Joined:	15 Mar 2007
Post:	28

2 Apr 2009 23:08:50 IST

0 People liked this

1493

Entropy change of system and surrounding

None

how do u find the of system and surrounding? and also total entropy change of Universe?

Share this article on:

Comments (2)

Bags

Hot goIITian

Joined: 14 Feb 2009

Posts: 168

3 Apr 2009 13:37:38 IST

Like 0 people liked this

the total entropy change of the universe is equal to the sum of the entropy change for the system plus the entropy change for the surrounding.

Every Spontaneous reaction is associated with an INCREASE IN THE ENTROPY OF THE UNIVERSE...

to find the entropy of the system at a constant temperature...use

for finding delta Ssurrounding , we have to consider the heat absorbed by the surroundings which is equal to .

At temperature T,the entropy change of the surroundings is

(at constant pressure)

Adding the two, the Entropy change for the universe can be found.

Rate if assured. Cheers!!

Bags

Hot goIITian

Joined: 14 Feb 2009

Posts: 168

3 Apr 2009 14:07:00 IST

Like 0 people liked this

hey...a bit of mistake here....the above was for reversible reac...for irrversibe reac the temperature of system and surrounding will be diff and hence the reac would lead to increase in entropy of the whole universe...in case of rev reac delta S univ = 0...Hope it Helps...

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team