Hess' law is applicable for determination of enthalpy of

Options

A. Reaction
B. Formaiton
C. Transition
D. None of these

Explanation

To determine the enthalpy of a reaction using Hess's Law, we can follow these steps:

### Step 1: Understand Hess's Law
Hess's Law states that the total enthalpy change for a chemical reaction is the same, regardless of whether the reaction occurs in one step or multiple steps. This is based on the principle of conservation of energy.

### Step 2: Identify the Reaction
Consider a reaction where we want to determine the enthalpy change (ΔH) from reactants to products. For example, let’s denote the reaction as:
\[ A \rightarrow B \]
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