Topic: Thermodynamics
Which of the following equations describes the behaviour of a thermodynamic system undergoing a phase transition?
- A. Clausius-Clapeyron equation
- B. Van der Waals equation
- C. Maxwell-Boltzmann distribution
- D. Gibbs-Duhem equation
Answer: A. Clausius-Clapeyron equation
Explanation: The Clausius-Clapeyron equation ($\frac{dP}{dT} = \frac{L}{T\Delta v}$) characterizes a discontinuous phase transition between two phases of matter of a single constituent. It relates vapor pressure and temperature for phase changes.