Question

Which one of the following is an intensive property of a thermodynamic system?

• A. Mass
• B. Density
• C. Energy
• D. Volume

Hint:

If a property remains the same even when the system is divided, it is intensive. If it scales with system size, it is extensive.

Answer 1

The Correct Option is B

Step 1: Intensive vs. Extensive properties.
- Extensive properties depend on the amount of matter (mass, volume, total energy). - Intensive properties remain unchanged even if the system is divided or combined (temperature, pressure, density).
Step 2: Check each option.
Mass: Doubles if the system size doubles → extensive.
Density: Ratio of mass and volume. If the system is divided into parts, both mass and volume reduce proportionally, keeping density the same → intensive.
Energy: Total energy increases with the amount of matter → extensive.
Volume: Increases when system size increases → extensive.
Step 3: Conclusion.
Density does not depend on the amount of substance and remains constant, making it an intensive property.
Final Answer: Density