Question

Define Hess's law??????????

Answer 1

The total amount of heat evolved or absorbed in a reaction is same weather the reaction take place in one step or in a no. of steps

Answer 2

The usefulness of Hess's law in thermochemistry. The Hess's law states that when reactants are converted to products, the change in enthalpy is the same whether the reaction takes place in one step or in a series of steps.