Summary
Summary Ieb Kc constant and Equilibrium Notes
- Course
- Institution
Equilibrium and Kc constant
[Show more]
Seller
Follow
StudentNotes2
Content preview
Chemical EquilibriumClosed System:
A closed system (in chemistry) is one in which mass is conserved inside the system but energy can enter or leave the
system freely
Closed System:
An open system (in chemistry) is one in which both energy and matter can be exchanged between the system and its
surroundings (gas being produced ..)
Reversible reaction:
A reversible reaction is one in which PRODUCTS can be converted back into REACTANTS
(Reactions that do not go to completion and occur in both the forward and reverse direction.)
For a reaction involving two reactants(A & B) and two products(C & D) this can be expressed symbolically as:
aA + bB ⇌ cC + dD
When the forward and reverse reactions take place at the SAME RATE
= dynamic equilibrium
For this to happen you need: a reversible reaction and a closed system.
The result is that the concentrations of reactants and products remain constant
Example of a reversible reaction:
𝐶𝑜𝐶𝑙42− + 6𝐻2 𝑂 ⇌ 𝐶𝑜(𝐻2 𝑂)2+
6 + 4𝐶𝑙
−
∆𝐻 < 0
Blue Pink
𝐶𝑜𝐶𝑙42− + 6𝐻2 𝑂 ⇌ 𝐶𝑜(𝐻2 𝑂)2+ −
6 + 4𝐶𝑙 + 𝑒𝑛𝑒𝑟𝑔𝑦
Faster
Add 𝐻2 𝑂 then = forward reaction is favoured
Add 𝐶𝑙 − then = reverse reaction is favoured
Faster
Exo
Add Heat Endo
= reverse reaction is favoured because the reverse reaction is endothermic
Remove heat = forward reaction is favoured because the forward reaction is exothermic
Le Chatelier’s Principle
When an external stress (change in pressure, temperature or concentration) is applied to a system in chemical
equilibrium, the equilibrium point will change in such a way to counteract the stress
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller StudentNotes2. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.70. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now