Higher Chemistry Hess's Law and Bond Enthalpy Calculations
Channel: Andrew Hay
Date: 2021-03-18

The clue's in the title. There appears to be only one page of outcomes according to the SQA for both topics, but there's a lot hidden behind that. These calculations are generally an easy way to gain marks once you understand them.
0:00 Intro
0:22 What does the Hess say?
1:43 Hess M/C Q
3:48 Hess written Q (quick version)
7:00 Hess Q (long version)
7:50 Equations assemble
8:35 Don't worry about the O2s
9:32 What are bond enthalpies?
10:10 Are some of them stingey?
11:10 An favourite SQA Q
11:36 How to do Bond Enthalpy Qs
12:12 2 Slogans for bonds
13:00 Lego with molecules
14:50 Remember to forget units
15:07 Recap