Question

You have a series of four chemical reactions. how do you calculate the h3 if you know the others?"

Answer 1

You have a series of four chemical reactions (1--> 2 --> 3 --> 4). How do you calculate the H2 if you know the other H values? H2 = (H1)(H3)/(H4) H2 = H4 ...

Answer 2

Welcome dear,

● Answer -
H3 = H4 - (H1 + H2)

● Hess's Law of Constant Heat Summation -
- Hess's Law states that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is the sum of all changes.
- This explains energy changes as state function.
- Ultimately amount of energy depends on the state of reactants and products but not the intermediates.

Here,
H4 = H1 + H2 + H3
H3 = H4 - (H1 + H2)


Hope this helps you...