Question

Which of the following are extensive properties?
\(Heat capacity \quad (B) Entropy \quad (C) Gibbs Energy \quad (D) Concentration \quad (E) Vapour pressure\)

• A. A, B, C and E
• B. A, B, and D
• C. A, B, and D
• D. A, B, E only

Hint:

Extensive properties depend on system size; intensive properties do not.

Answer 1

The Correct Option is C

Extensive and Intensive Properties 

Extensive properties depend on the amount of substance or the size of the system. Let’s evaluate each option:

• Heat Capacity (A): \( \text{Extensive} \) — it increases with the amount of substance.
• Entropy (B): \( \text{Extensive} \) — it is additive over the components of the system.
• Gibbs Energy (C): \( \text{Extensive} \) — it scales with the size of the system.
• Concentration (D): \( \text{Intensive} \) — it is independent of the quantity of substance.
• Vapour Pressure (E): \( \text{Intensive} \) — it depends only on temperature, not system size.

Conclusion: The extensive properties are: \[ \boxed{A, B, \text{ and } C} \]