Question

Overall the enthalpy change for a reaction is equal to sum of enthalpy changes of individual steps in the reaction is the statement of _ _ _ _ _.
1)Hess's law
2)first law of thermodynamics
3)second law of thermodynamics
4)third law of thermodynamics​

Answer 1

Answer:

number 3 but I'm not sure

Answer 2

Answer:

1. Hess's law .

Explanation:

Hess' law of constant heat summation, also known as Hess' law (or Hess's law), is a relationship in physical chemistry named after Germain Hess, a Switzerland-born Russian chemist and physician who published it in 1840. The law states that the total enthalpy change during the complete course of a chemical reaction is the same whether the reaction is made in one step or in several steps.