Enthalpy is an extensive property.In general, if enthalpy of an overall reaction `A to B` along one route is `Delta_(r)H` and `Delta_(r)H_(1) + Delta_(r)H_(2) + Delta_(r)H_(3)` ... Represent enthalpies of intermediate reactions leading to product B.What will be the relation between `Delta_(r)H` for overall reaction and `Delta_(r)H_(1), Delta_(r)H_(2)`....etc, for intermediate reactions.

Explanation

To solve the problem regarding the relationship between the enthalpy change of an overall reaction and the enthalpy changes of intermediate reactions, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Enthalpy as an Extensive Property**:
- Enthalpy (H) is an extensive property, meaning it depends on the amount of substance present. Therefore, the total enthalpy change for a reaction is the sum of the enthalpy changes of all steps involved in the reaction.

2. **Identifying the Overall Reaction**:
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