100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Summary Energetics I £3.99   Add to cart
Quickly navigate to
Preview
  2.  
  3. PEARSON (PEARSON)
  4.  
  5. Chemistry 2015
  6.  
  7. Unit 8 - Energetics I (9CH0)

Summary

Summary Energetics I
 48 views  0 purchase

Detailed notes on energetics I. Notes written using Edexcel Chemistry textbooks, past papers and more. Written by a student with all A*s at GCSE, 3A* predictions at A Level and with an offer for Natural Sciences at Cambridge.

Preview 1 out of 4  pages

Document information

  • No
  • Energetics i
  • March 30, 2020
  • 4
  • 2019/2020
  • Summary

Subjects

Connected book

book image

Book Title:

Author(s):

  • Edition:
  • ISBN:
  • Edition:

More summaries for

All for this textbook (12)

Written for

All documents for this subject (12)

Seller

avatar-seller
natland9

Reviews received

Content preview

Topic 8: Energetics I
1. know that standard conditions are 100 kPa and a specified temperature,
usually 298 K
Standard Conditions
Temperature: 298K
Pressure: 100kPa

Standard conditions are used to show enthalpy changes because they are affected by
temperature and pressure. H means the measurements were taken under standard
conditions.

2. know that the enthalpy change is the heat energy change measured at
constant pressure
Enthalpy change H: the heat change in a reaction at a constant pressure (kJ/mol)

Endothermic: reactions absorb heat energy so H is positive
 indicated by a decrease in temperature
 when bonds are broken
 CaCO3(s)  CaO(s) + CO2(g) rH = +178 kJ/mol
Exothermic: reactions release heat energy so H is negative
 indicated by an increase in temperature
 when bonds are made
 CH4(g) + 2O2(g)  CO2(g) + 2H2O(l) cH = -890kJ/mol



3. be able to construct and interpret enthalpy level diagrams showing an
enthalpy change, including appropriate signs for exothermic and
endothermic reactions
Endothermic Exothermic


Enthalpy
level
diagram




Reaction
profile
diagram

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

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 natland9. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £3.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

78291 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£3.99
  • (0)
  Add to cart