When a spring is wound, a certain amount of PE is stored in it. If this wound spring is dissolved in acid, the stored energy

Options

A. is completely lost
B. appears in the form of electromagnetic waves
C. appears in the form of heart raising the temperature of the acid
D. appears in the form of KE by splashing acid drops

Answer

To solve the question regarding the potential energy stored in a wound spring that is then dissolved in acid, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Potential Energy in a Spring**:
- A wound (or compressed) spring stores potential energy (PE) due to its deformation. The potential energy in a spring can be calculated using the formula:
\[ PE = \frac{1}{2} k x^2 \]
where \( k \) is the spring constant and \( x \) is the displacement from the equilibrium position.

2. **Dissolving the Spring in Acid**:
- When the spring is dissolved in acid, the chemical reaction occurs between the acid and the material of the spring. This process involves breaking down the molecular structure of the spring.

3. **Conversion of Potential Energy**:
- As the spring dissolves, the potential energy stored in the spring is released. This energy does not disappear; instead, it transforms into other forms of energy.

4. **Energy Transformation**:
- The stored potential energy is converted primarily into kinetic energy of the molecules in the acid and heat energy due to the reaction. The kinetic energy arises from the movement of the acid molecules as they interact with the spring material.

5. **Heat Generation**:
- The energy released during the dissolution process may also result in an increase in temperature of the solution, which is a manifestation of heat energy. This is due to the exothermic nature of some chemical reactions.

6. **Conclusion**:
- Therefore, when a wound spring is dissolved in acid, the stored potential energy is converted into kinetic energy of the acid molecules and heat energy, resulting in a release of energy into the surroundings.

### Final Answer:
When a wound spring is dissolved in acid, the stored potential energy is converted into kinetic energy and heat energy.

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