enthalpy and heat change

syamdcs

You people heard about hess law means that sum of all enthalpies of chemical reactions takes place but why we only call sum of all enthalpies?

1)
A----B dH1
B----C dH2 HESS LAW
DH = dH1 + dH2

2)
A----B dQ1
B----C dQ2 ?
DQ = dQ1 + dQ2
In the above representations one is associated with enthapy and another is heat
whethe second one is valid or not?if so why?

Hootenanny

Welcome to the forums syamdcs,

According to the rules of the forum, you must show your work/attempt before we can offer any assistance. Also, in future, could you please post homework questions in the appropriate forum. Thanks.

bashiru

please i will like u to give me some major diferences btw thermodynamic and kinetic stability