Hello, at 1:40 you said that it is a complete combustion reaction. So shouldn't you be using the combustion formula which is reactants - products? Or can you use both the equations for any equations? If you could get back to me, that'd be awesome. Cheers!
When using enthalpy of formation values it is products minus reactants. When using enthalpy of combustion values it is reactants minus products. In the video I use enthalpy of formation values to calculate the enthalpy change for the combustion reaction.
were there instances where they would ask for a definition of the different delta h's in exams? i.e. define enthalpy change of formation, combustion, neutralisation, etc...
Hello, at 1:40 you said that it is a complete combustion reaction. So shouldn't you be using the combustion formula which is reactants - products? Or can you use both the equations for any equations? If you could get back to me, that'd be awesome.
Cheers!
When using enthalpy of formation values it is products minus reactants. When using enthalpy of combustion values it is reactants minus products. In the video I use enthalpy of formation values to calculate the enthalpy change for the combustion reaction.
@@MSJChem ok so you can use either right? That makes sense, thank you!
What if the formation values are not in the Data Booklet?
he mentioned that if they are elements such as O2 they will be 0. so i would assume that any values that aren't in the data booklet are 0.
what is the combination for the standard enthalpy change for neutralization???
May I ask what you mean?
where did u get the standard enthalpy change of formation of CO2 and H2O
Table 13 of the IB data booklet.
were there instances where they would ask for a definition of the different delta h's in exams? i.e. define enthalpy change of formation, combustion, neutralisation, etc...
The IB doesn’t really ask for definitions anymore - it’s more likely you will be asked to calculate an enthalpy change using these concepts.