In which cell the free energy of a chemical reaction is directly converted into electricity

Options

A. Leclanche cell
B. Concentration cell
C. Fuel cell
D. Lead storage battery

Explanation

To determine which cell converts the free energy of a chemical reaction directly into electricity, we can analyze the types of electrochemical cells.

### Step-by-Step Solution:

1. **Understanding Electrochemical Cells**:
- Electrochemical cells are devices that convert chemical energy into electrical energy or vice versa. They can be classified into two main types: galvanic (or voltaic) cells and electrolytic cells.

2. **Galvanic Cells**:
- Galvanic cells convert chemical energy from spontaneous reactions into electrical energy. In these cells, a chemical reaction occurs that generates an electric current.

3. **Electrolytic Cells**:
- Electrolytic cells, on the other hand, require an external source of electrical energy to drive a non-spontaneous chemical reaction. They do not convert chemical energy into electrical energy.

4. **Fuel Cells**:
- Among the various types of galvanic cells, fuel cells are specifically designed to convert the chemical energy of fuels (like hydrogen) directly into electrical energy through electrochemical reactions.

5. **Conclusion**:
- The cell in which the free energy of a chemical reaction is directly converted into electricity is the **fuel cell**.

### Final Answer:
The cell in which the free energy of a chemical reaction is directly converted into electricity is the **fuel cell**.

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