Which of the following is an example of intensive property?

Options

A. Enthalpy
B. Energy
C. Mass of substance
D. Surface tension

Answer

To determine which of the following is an example of an intensive property, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Intensive Properties**:
- An intensive property is a physical property of a system that does not depend on the size or extent of the system. Examples include temperature, pressure, density, and surface tension.

2. **Analyzing Each Option**:
- **Option A: Enthalpy (H)**
- Enthalpy is defined as H = E + P*V, where E is internal energy, P is pressure, and V is volume. Since enthalpy depends on the volume (and thus the mass) of the substance, it is an extensive property.
- **Option B: Energy**
- Energy is often expressed as E = 1/2 mv² (kinetic energy), which clearly depends on mass (m). Therefore, energy is also an extensive property.
- **Option C: Surface Tension (γ)**
- Surface tension is defined as force per unit length (γ = F/L). This property does not depend on the amount of substance present, making it an intensive property.
- **Option D: (Another property)**
- Without knowing the specific property listed in option D, we cannot analyze it. However, if it is not surface tension, it is likely not an intensive property.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option C: Surface Tension**.

### Final Answer:
**Surface Tension is an example of an intensive property.**

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