State whether each of the following processes is exothermic or endothermic : `HCl (aq) + NaOH (aq) to NaCl(aq) + H_2O (l) , DeltaH = - 57.1 kJ `

Explanation

To determine whether the process \( \text{HCl (aq)} + \text{NaOH (aq)} \rightarrow \text{NaCl (aq)} + \text{H}_2\text{O (l)} \) is exothermic or endothermic, we can analyze the given information about the change in enthalpy (\( \Delta H \)).

### Step-by-Step Solution:

1. **Identify the Reaction**: The reaction provided is:
\[ \text{HCl (aq)} + \text{NaOH (aq)} \rightarrow \text{NaCl (aq)} + \text{H}_2\text{O (l)} \]
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