I'm desperate how do you do hess' law? explain as dumbly as possible, as i am stupid. yes, i've asked this question 2x already but maybe third times the charm? idk me i'll be forever indebted to you and will award brainliest answer so

Alright dude, Hess' law isn't as complicated as most people think

Take this example
look for the change in enthalpy of  A+B-> AB

A + B -> C    enthalpy=10 kJ

C -> AB      enthalpy=10 kJ

now if you add everything together you come up with

A + B + C --> AB + C      enthalpy= 10kJ + 10 kJ= 20kJ

But notice how C is one the left and on the right of that-- so if it's on the left and on the right of the equation, you could just cancel it out

so you get A+B--> AB

tadaaa!! You found the equation you were looking for

and you know that it's enthalpy is= 10kJ + 10kJ= 20kJ

Hope that helps ya fam!