Two persons A and B got burns one with boiling water at `100^(@)C` and other due to steam at `100^(@)C` respectivley. Which person is affected more?

Options

A. A
B. B
C. Both A and B to the same extent
D. None of the above

Explanation

To determine which person, A or B, is affected more by burns from boiling water and steam, we need to analyze the energy involved in both cases.

### Step-by-Step Solution:

1. **Understanding the Temperature**:
Both A and B are exposed to substances at the same temperature of 100°C. A is burned by boiling water, while B is burned by steam.

2. **Energy Content of Water and Steam**:
At 100°C, boiling water (liquid) and steam (gas) exist at the same temperature, but they have different energy contents. Steam contains additional energy due to its state.

3. **Latent Heat of Vaporization**:
When water turns into steam, it absorbs energy in the form of latent heat of vaporization. This energy is not used to increase the temperature but is stored within the steam molecules. The latent heat of vaporization for water is approximately 540 calories per gram.

4. **Energy Transfer During Burns**:
- When person A (burned by boiling water) comes into contact with water, the water transfers its heat to A, causing burns.
- When person B (burned by steam) comes into contact with steam, the steam condenses into water and releases the latent heat of vaporization in addition to the heat from the steam itself.

5. **Comparison of Energy Transfer**:
- The energy transferred to person A is primarily the heat from the boiling water.
- The energy transferred to person B includes both the heat from the steam and the latent heat released during condensation, which is significantly higher.

6. **Conclusion**:
Since person B experiences a greater energy transfer due to the additional latent heat of vaporization released when steam condenses, person B is affected more severely than person A.

### Final Answer:
Person B, who is burned by steam at 100°C, is affected more than person A, who is burned by boiling water at 100°C.

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