Question

hess lawफैसला इसम्मेशन ​

Answer 1

Answer:

Hess' law of constant heat summation, also known as Hess' law, is a relationship in physical chemistry named after Germain Hess, a Swiss-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.