What will be standard enthalpy of formation of `H_(2)O(l)`?

Explanation

To find the standard enthalpy of formation of liquid water (H₂O(l)), we can follow these steps:

### Step 1: Understand the Reaction
The standard enthalpy of formation (ΔH_f°) is defined for the formation of one mole of a compound from its elements in their standard states. For water, the reaction can be represented as:
\[ \text{H}_2(g) + \frac{1}{2} \text{O}_2(g) \rightarrow \text{H}_2\text{O}(l) \]

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