The reaction `2SO_(2) + O_(2) rarr 2SO_(3) + heat` . The equilibrium reaction proceeds in forward direction by :

Options

A. Addition of `O_(2)`
B. Removal of `O_(2)`
C. Addition of inert gas
D. Cannot proceed

Explanation

To determine how the equilibrium reaction `2SO2 + O2 ⇌ 2SO3 + heat` proceeds in the forward direction, we can analyze the factors that affect the equilibrium position according to Le Chatelier's principle.

### Step-by-Step Solution:

1. **Identify the Reaction Type**:
The given reaction is `2SO2 + O2 ⇌ 2SO3 + heat`. This is an exothermic reaction, meaning it releases heat when moving in the forward direction.

2. **Understand Le Chatelier's Principle**:
Le Chatelier's principle states that if an external change is applied to a system at equilibrium, the system will adjust to counteract that change and restore a new equilibrium.

3. **Analyze the Options**:
We need to evaluate which factors can push the equilibrium towards the forward direction (producing more SO3).

- **Option 1: Addition of O2**:
- Increasing the concentration of a reactant (O2) will shift the equilibrium to the right (forward direction) to produce more products (SO3). This is because the system will try to consume the added O2 to restore equilibrium.
- **Conclusion**: This option will proceed in the forward direction.

- **Option 2: Removal of O2**:
- Removing a reactant will shift the equilibrium to the left (backward direction) to produce more reactants.
- **Conclusion**: This option will not proceed in the forward direction.

- **Option 3: Addition of an Inert Gas**:
- Adding an inert gas at constant volume does not affect the equilibrium concentrations of the reactants and products. At constant pressure, it can decrease the partial pressures of the reactants and products, potentially shifting the equilibrium to the side with more moles (backward direction).
- **Conclusion**: This option does not proceed in the forward direction.

4. **Final Conclusion**:
The only factor that will drive the equilibrium reaction in the forward direction is the **addition of O2**.

### Summary:
The equilibrium reaction proceeds in the forward direction by the addition of O2.