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

Inorganic Chemistry

New kid on the Block

Joined:	16 Oct 2009
Post:	9

11 Nov 2009 20:49:52 IST

0 People liked this

210

why does the delta H value for flourides become less negative as we go down the gorup whilst the rev

None

why does the delta H value for flourides become less negative as we go down the gorup whilst the reverse is true for delta H for chlorides, bromides and iodides?

Share this article on:

Comments (1)

Krishna Gopal Singh

Forum Expert

Joined: 29 Dec 2006

Posts: 5153

26 Jan 2012 06:45:55 IST

Like 0 people liked this

In these question i am assuming you are asking about delta H of formation of metal hallides.

Fluoride is a small anion which fits well with smaller atioms. That is why its delta H becomes less negative as we go down the group. Other hallides for bigger anions and hence they fit well with larger cations. That is why trend is opposite in there case.

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