The electron gain enthalpy of chlorine is `–349 kJ mol^(–1)` . How much energy in kJ is released when 3.55 g of chlorine is converted completely into `Cl^(–1)` ion in the gaseous state?

Explanation

To solve the problem, we need to determine how much energy is released when 3.55 g of chlorine gas (Cl₂) is converted into Cl⁻ ions. We will use the given electron gain enthalpy of chlorine, which is -349 kJ/mol.

### Step-by-Step Solution:

1. **Determine the Molar Mass of Chlorine:**
- The molar mass of Cl₂ (chlorine gas) is approximately 70.9 g/mol (since Cl has a molar mass of about 35.45 g/mol, and there are two chlorine atoms in Cl₂).

\[
...