Question

Which of the following are extensive properties?
\[ (A)\ \text{Heat Capacity} \] \[ (B)\ \text{Entropy} \] \[ (C)\ \text{Gibbs Energy} \] \[ (D)\ \text{Concentration} \] \[ (E)\ \text{Vapour Pressure} \]

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

Hint:

Extensive properties depend on the amount of matter present, whereas intensive properties do not.
Examples: Extensive: Mass, Volume, Entropy, Enthalpy, Gibbs Energy Intensive: Temperature, Pressure, Density, Concentration, Vapour Pressure

Answer 1

The Correct Option is C

Step 1: Distinguish extensive vs intensive properties.
Extensive properties depend on the amount of matter (they scale with size): mass, volume, heat capacity, entropy, Gibbs energy. Intensive properties do not depend on amount: temperature, pressure, density, concentration, vapour pressure.

Step 2: Classify the given list.
A (Heat capacity) -- extensive. B (Entropy) -- extensive. C (Gibbs energy) -- extensive. D (Concentration) -- intensive. E (Vapour pressure) -- intensive. Only A, B, C are extensive. \[ oxed{A, B, C ext{ only}} \]