15.2 Two ways to work out delta G [HL IB Chemistry]

You can use the thermodynamic equation (delta G = deltaH -- TdeltaS) OR products minus reactants. Or yawn-and-strech then peek at your neighbours paper.

[bobjoe]

When you were calculating delta G using the second method, was the formula supposed to have sum signs instead of change in signs? Thanks and great video.

[fernandoduartemolina]

jajaja I love the sound of him looking for something in his data booklet 😂

[briannarussell]

Hi, just wondered if you can change the delta H or the delta G to make them both either joules or kilojoules...is it ok either way if they're the same?

[fareehasid]

Hi Mr. Thornley,  

Love your video, but just wanted to clear something... why is delta S positive when the enthalpy is negative (hence exothermic)? Aren't exothermic reactions more stable, therefore they have lower entropy? To add, endothermic reactions have an increase in entropy, making entropy postive. But when there is an exothermic reaction, should entropy not be negative? 

Also, what exactly is the relationship between spontaneous reactions and the change in enthalpy (exo and endothermic)? 

Thank you!

[johnnyroche]

Hi Mr. Thornley,

I have a quick question: Whats the difference between KJ and JK?

[RedmercyGG]

Nice video! I heard the data booklet noise btw, message received. XD

[sheppycider]

Thanks for the help, you're a babe (but it's 'its' not 'it's').