`C_(2)H_(6) + 7/2 O_(2) to 2CO_(2) + 3H_(2)O, Delta_(r)H^(@) = -1560 kJ`
`Delta_(r)H^(@)` is the heat of ....... of ethane

Explanation

To determine the type of heat change represented by the given reaction of ethane, we can follow these steps:

### Step 1: Identify the Reaction
The reaction provided is:
\[ C_2H_6 + \frac{7}{2} O_2 \rightarrow 2 CO_2 + 3 H_2O \]
This reaction shows ethane (C₂H₆) reacting with oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O).

### Step 2: Analyze the Enthalpy Change
...