Reiner
Badges: 9
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 4 years ago
#1
When predicting enthalpies of formation of theoretical compounds It is talked about on page 264 and 265 on the aqa textbook but i don't really understand the reasoning behind it.
0
reply
charco
Badges: 18
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 4 years ago
#2
(Original post by Reiner)
When predicting enthalpies of formation of theoretical compounds It is talked about on page 264 and 265 on the aqa textbook but i don't really understand the reasoning behind it.
You can use a Born-Haber cycle to predict the formation enthalpy of hypothetical compounds. If the result is less exothermic then the hypothetical compound is likely to be less stable.
1
reply
Reiner
Badges: 9
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report Thread starter 4 years ago
#3
(Original post by charco)
You can use a Born-Haber cycle to predict the formation enthalpy of hypothetical compounds. If the result is less exothermic then the hypothetical compound is likely to be less stable.
why does it being less exothermic make it less stable and does this apply to all examples?
0
reply
charco
Badges: 18
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#4
Report 4 years ago
#4
(Original post by Reiner)
why does it being less exothermic make it less stable and does this apply to all examples?
The more exothermic a process is the more likely it is. This is fundamentally the 2nd law of thermodynamics.

An exothermic process releases energy to the surroundings increasing the entropy of the surroundings and hence of the universe.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Would you give consent for uni's to contact your parent/trusted person in a mental health crisis?

Yes - my parent/carer (106)
34.42%
Yes - a trusted person (88)
28.57%
No (81)
26.3%
I'm not sure (33)
10.71%

Watched Threads

View All
Latest
My Feed