Summary
Summary Ieb Energy change and rate of reaction Notes
- Course
- Institution
Energy changes and graphs and rate of reactions
[Show more]
Seller
Follow
StudentNotes2
Content preview
Energy changes and Rates of ReactionsEnthalpy (H):
A measure of the internal energy (Ep) of the reactants or products
∆𝐻 = heat of reaction:
The net change of chemical potential energy of the system
Temperature:
The average kinetic energy of the composing particles
When heat is absorbed by a chemical reaction the Ep will increases and the temperature will decrease (Ek decrease)
∆𝐻 > 0
When heat is released by a chemical reaction the temperature will increase (Ek increase) the Ep will decrease
∆𝐻 < 0
∆𝐻 = 𝐻𝑓 − 𝐻𝑖
Exothermic Reaction:
Reactions which transform chemical potential energy into thermal energy ∆𝐻 − 𝑑𝑒𝑐𝑟𝑒𝑎𝑠𝑒𝑠 ∆𝐻 < 0
BOND FORMATION
Energy is released to the surroundings
𝐸𝑐ℎ𝑒𝑚 𝑝𝑜𝑡 → 𝐸𝑘 (thermal disappears)
Releases heat and thus increases the temperature of the reaction mixture
Potential Energy Curve
Activated Complex
H
Ep
(kJ.mol-1) ∆𝐻 = 𝐻𝑓 − 𝐻𝑖
Ea
∆𝐻 < 0
H decreases
Hi Decreases
Reactants potential energy
∆𝐻
therefore
Hf
Products
thermal energy
Progress of reaction
Or
Reaction Pathway
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 $5.98. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now